Making build.sh sourcing more robust (Closes: #684896).

69 files changed, 69 insertions, 69 deletions

diff --git a/bin/lb b/bin/lb
index e2d756688..1dd6a66cd 100755
--- a/bin/lb
+++ b/bin/lb
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'utility to build Debian Live systems')"
diff --git a/bin/live-build b/bin/live-build
index 7a9aedd68..d7eb28f66 100755
--- a/bin/live-build
+++ b/bin/live-build
@@ -23,7 +23,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 if [ -x "$(which man 2>/dev/null)" ]
 then
diff --git a/scripts/build/lb_binary b/scripts/build/lb_binary
index e0e3e47d3..4fbbc096d 100755
--- a/scripts/build/lb_binary
+++ b/scripts/build/lb_binary
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Automatically populating config tree
 if [ -x auto/config ] && [ ! -e .build/config ]
diff --git a/scripts/build/lb_binary_checksums b/scripts/build/lb_binary_checksums
index baa0b4633..e6ece1457 100755
--- a/scripts/build/lb_binary_checksums
+++ b/scripts/build/lb_binary_checksums
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'create binary checksums')"
diff --git a/scripts/build/lb_binary_chroot b/scripts/build/lb_binary_chroot
index 0b7fa067f..4d4500e55 100755
--- a/scripts/build/lb_binary_chroot
+++ b/scripts/build/lb_binary_chroot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'copy chroot into chroot')"
diff --git a/scripts/build/lb_binary_debian-installer b/scripts/build/lb_binary_debian-installer
index b3c3fd9ae..a6ed88b6e 100755
--- a/scripts/build/lb_binary_debian-installer
+++ b/scripts/build/lb_binary_debian-installer
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install debian-installer into binary')"
diff --git a/scripts/build/lb_binary_disk b/scripts/build/lb_binary_disk
index e42a4becc..e8e5c0ddc 100755
--- a/scripts/build/lb_binary_disk
+++ b/scripts/build/lb_binary_disk
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install disk information into binary')"
diff --git a/scripts/build/lb_binary_grub b/scripts/build/lb_binary_grub
index 4633b5fd8..1dd1201e7 100755
--- a/scripts/build/lb_binary_grub
+++ b/scripts/build/lb_binary_grub
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs grub into binary')"
diff --git a/scripts/build/lb_binary_grub2 b/scripts/build/lb_binary_grub2
index 1f783f10a..738f28006 100755
--- a/scripts/build/lb_binary_grub2
+++ b/scripts/build/lb_binary_grub2
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs grub2 into binary')"
diff --git a/scripts/build/lb_binary_hdd b/scripts/build/lb_binary_hdd
index c5ce8dd80..4dd515fee 100755
--- a/scripts/build/lb_binary_hdd
+++ b/scripts/build/lb_binary_hdd
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build binary image')"
diff --git a/scripts/build/lb_binary_hooks b/scripts/build/lb_binary_hooks
index 97faa3077..cd1270be5 100755
--- a/scripts/build/lb_binary_hooks
+++ b/scripts/build/lb_binary_hooks
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'execute hooks in binary')"
diff --git a/scripts/build/lb_binary_includes b/scripts/build/lb_binary_includes
index 43fd5d07a..f1f345a95 100755
--- a/scripts/build/lb_binary_includes
+++ b/scripts/build/lb_binary_includes
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'copy files into binary')"
diff --git a/scripts/build/lb_binary_iso b/scripts/build/lb_binary_iso
index cfd7eb2a5..c25674bbb 100755
--- a/scripts/build/lb_binary_iso
+++ b/scripts/build/lb_binary_iso
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build iso binary image')"
diff --git a/scripts/build/lb_binary_linux-image b/scripts/build/lb_binary_linux-image
index 9c530a795..94afac8f9 100755
--- a/scripts/build/lb_binary_linux-image
+++ b/scripts/build/lb_binary_linux-image
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install linux-image into binary')"
diff --git a/scripts/build/lb_binary_manifest b/scripts/build/lb_binary_manifest
index e0f17ed9a..b62a43754 100755
--- a/scripts/build/lb_binary_manifest
+++ b/scripts/build/lb_binary_manifest
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'create manifest')"
diff --git a/scripts/build/lb_binary_memtest b/scripts/build/lb_binary_memtest
index 1c0683189..d96c778d2 100755
--- a/scripts/build/lb_binary_memtest
+++ b/scripts/build/lb_binary_memtest
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs a memtest into binary')"
diff --git a/scripts/build/lb_binary_netboot b/scripts/build/lb_binary_netboot
index 9875d0e5c..08cc9d308 100755
--- a/scripts/build/lb_binary_netboot
+++ b/scripts/build/lb_binary_netboot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build netboot binary image')"
diff --git a/scripts/build/lb_binary_package-lists b/scripts/build/lb_binary_package-lists
index c77b15064..86716785d 100755
--- a/scripts/build/lb_binary_package-lists
+++ b/scripts/build/lb_binary_package-lists
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install local packages into binary')"
diff --git a/scripts/build/lb_binary_rootfs b/scripts/build/lb_binary_rootfs
index 68fae4091..6704b524a 100755
--- a/scripts/build/lb_binary_rootfs
+++ b/scripts/build/lb_binary_rootfs
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build rootfs image')"
diff --git a/scripts/build/lb_binary_silo b/scripts/build/lb_binary_silo
index f2f0c62be..b1ec175e4 100755
--- a/scripts/build/lb_binary_silo
+++ b/scripts/build/lb_binary_silo
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs silo into binary')"
diff --git a/scripts/build/lb_binary_syslinux b/scripts/build/lb_binary_syslinux
index 41b141db2..cf9c4a2c6 100755
--- a/scripts/build/lb_binary_syslinux
+++ b/scripts/build/lb_binary_syslinux
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs syslinux into binary')"
diff --git a/scripts/build/lb_binary_tar b/scripts/build/lb_binary_tar
index 83fdc25ee..9b9b3dec0 100755
--- a/scripts/build/lb_binary_tar
+++ b/scripts/build/lb_binary_tar
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build harddisk binary image')"
diff --git a/scripts/build/lb_binary_virtual-hdd b/scripts/build/lb_binary_virtual-hdd
index b58c80355..f8121e625 100755
--- a/scripts/build/lb_binary_virtual-hdd
+++ b/scripts/build/lb_binary_virtual-hdd
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build binary image')"
diff --git a/scripts/build/lb_binary_win32-loader b/scripts/build/lb_binary_win32-loader
index 1eaed9fee..7fd5ff2a4 100755
--- a/scripts/build/lb_binary_win32-loader
+++ b/scripts/build/lb_binary_win32-loader
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'copy win32-loader into binary')"
diff --git a/scripts/build/lb_binary_yaboot b/scripts/build/lb_binary_yaboot
index 271528406..4838cf351 100755
--- a/scripts/build/lb_binary_yaboot
+++ b/scripts/build/lb_binary_yaboot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'installs yaboot into binary')"
diff --git a/scripts/build/lb_binary_zsync b/scripts/build/lb_binary_zsync
index 271e70969..7fdaf596a 100755
--- a/scripts/build/lb_binary_zsync
+++ b/scripts/build/lb_binary_zsync
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build zsync control files')"
diff --git a/scripts/build/lb_bootstrap b/scripts/build/lb_bootstrap
index 2b84b993a..ed9c77498 100755
--- a/scripts/build/lb_bootstrap
+++ b/scripts/build/lb_bootstrap
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Automatically populating config tree
 if [ -x auto/config ] && [ ! -e .build/config ]
diff --git a/scripts/build/lb_bootstrap_cache b/scripts/build/lb_bootstrap_cache
index 51c9363db..6b0f582ea 100755
--- a/scripts/build/lb_bootstrap_cache
+++ b/scripts/build/lb_bootstrap_cache
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'cache bootstrap stage')"
diff --git a/scripts/build/lb_bootstrap_cdebootstrap b/scripts/build/lb_bootstrap_cdebootstrap
index 931c837f0..3c8843e2b 100755
--- a/scripts/build/lb_bootstrap_cdebootstrap
+++ b/scripts/build/lb_bootstrap_cdebootstrap
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'bootstrap a Debian system with cdebootstrap(1)')"
diff --git a/scripts/build/lb_bootstrap_copy b/scripts/build/lb_bootstrap_copy
index ce1abd00a..1028342c6 100755
--- a/scripts/build/lb_bootstrap_copy
+++ b/scripts/build/lb_bootstrap_copy
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'bootstrap by copying the host system')"
diff --git a/scripts/build/lb_bootstrap_debootstrap b/scripts/build/lb_bootstrap_debootstrap
index d9a4e8212..b0fa09fa1 100755
--- a/scripts/build/lb_bootstrap_debootstrap
+++ b/scripts/build/lb_bootstrap_debootstrap
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'bootstrap a Debian system with debootstrap(8)')"
diff --git a/scripts/build/lb_build b/scripts/build/lb_build
index bdec9b2f5..d7b989dec 100755
--- a/scripts/build/lb_build
+++ b/scripts/build/lb_build
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Automatically populating config tree
 if [ -x auto/config ] && [ ! -e .build/config ]
diff --git a/scripts/build/lb_chroot b/scripts/build/lb_chroot
index 944155b5b..1c6348293 100755
--- a/scripts/build/lb_chroot
+++ b/scripts/build/lb_chroot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Automatically populating config tree
 if [ -x auto/config ] && [ ! -e .build/config ]
diff --git a/scripts/build/lb_chroot_apt b/scripts/build/lb_chroot_apt
index 0c07d4f99..2e1bce289 100755
--- a/scripts/build/lb_chroot_apt
+++ b/scripts/build/lb_chroot_apt
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /etc/apt/apt.conf')"
diff --git a/scripts/build/lb_chroot_archives b/scripts/build/lb_chroot_archives
index 1d0bee92c..d0033d29e 100755
--- a/scripts/build/lb_chroot_archives
+++ b/scripts/build/lb_chroot_archives
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /etc/apt/sources.list')"
diff --git a/scripts/build/lb_chroot_cache b/scripts/build/lb_chroot_cache
index 785c2f90c..4c4b055bf 100755
--- a/scripts/build/lb_chroot_cache
+++ b/scripts/build/lb_chroot_cache
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'cache chroot stage')"
diff --git a/scripts/build/lb_chroot_debianchroot b/scripts/build/lb_chroot_debianchroot
index 285e858f1..7e07b3655 100755
--- a/scripts/build/lb_chroot_debianchroot
+++ b/scripts/build/lb_chroot_debianchroot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /etc/debian_chroot')"
diff --git a/scripts/build/lb_chroot_devpts b/scripts/build/lb_chroot_devpts
index 2e7365d66..428927f06 100755
--- a/scripts/build/lb_chroot_devpts
+++ b/scripts/build/lb_chroot_devpts
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'mount /dev/pts')"
diff --git a/scripts/build/lb_chroot_dpkg b/scripts/build/lb_chroot_dpkg
index d4f0631f0..9698f7923 100755
--- a/scripts/build/lb_chroot_dpkg
+++ b/scripts/build/lb_chroot_dpkg
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /sbin/dpkg')"
diff --git a/scripts/build/lb_chroot_hacks b/scripts/build/lb_chroot_hacks
index 7c863d958..f0e885b08 100755
--- a/scripts/build/lb_chroot_hacks
+++ b/scripts/build/lb_chroot_hacks
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'execute hacks in chroot')"
diff --git a/scripts/build/lb_chroot_hooks b/scripts/build/lb_chroot_hooks
index e8a03d0f6..b81e3cb24 100755
--- a/scripts/build/lb_chroot_hooks
+++ b/scripts/build/lb_chroot_hooks
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'execute hooks in chroot')"
diff --git a/scripts/build/lb_chroot_hostname b/scripts/build/lb_chroot_hostname
index f6aa323bc..9f56901e4 100755
--- a/scripts/build/lb_chroot_hostname
+++ b/scripts/build/lb_chroot_hostname
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /bin/hostname')"
diff --git a/scripts/build/lb_chroot_hosts b/scripts/build/lb_chroot_hosts
index d17243b95..3adaebfe4 100755
--- a/scripts/build/lb_chroot_hosts
+++ b/scripts/build/lb_chroot_hosts
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /etc/hosts')"
diff --git a/scripts/build/lb_chroot_includes b/scripts/build/lb_chroot_includes
index 7d0d77dbb..8d3c75eee 100755
--- a/scripts/build/lb_chroot_includes
+++ b/scripts/build/lb_chroot_includes
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'copy files into chroot')"
diff --git a/scripts/build/lb_chroot_install-packages b/scripts/build/lb_chroot_install-packages
index a16164e3f..d7d916496 100755
--- a/scripts/build/lb_chroot_install-packages
+++ b/scripts/build/lb_chroot_install-packages
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install queued packages into chroot')"
diff --git a/scripts/build/lb_chroot_interactive b/scripts/build/lb_chroot_interactive
index 55c1bd994..31a34fc8a 100755
--- a/scripts/build/lb_chroot_interactive
+++ b/scripts/build/lb_chroot_interactive
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'make build interactive')"
diff --git a/scripts/build/lb_chroot_linux-image b/scripts/build/lb_chroot_linux-image
index 6a180d266..bb672c1d2 100755
--- a/scripts/build/lb_chroot_linux-image
+++ b/scripts/build/lb_chroot_linux-image
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'schedule kernel packages for installation')"
diff --git a/scripts/build/lb_chroot_live-packages b/scripts/build/lb_chroot_live-packages
index 98b75efde..057e423f6 100755
--- a/scripts/build/lb_chroot_live-packages
+++ b/scripts/build/lb_chroot_live-packages
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'schedule live packages for installation')"
diff --git a/scripts/build/lb_chroot_package-lists b/scripts/build/lb_chroot_package-lists
index d99624d37..b85c00059 100755
--- a/scripts/build/lb_chroot_package-lists
+++ b/scripts/build/lb_chroot_package-lists
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'queue install of package lists into chroot')"
diff --git a/scripts/build/lb_chroot_preseed b/scripts/build/lb_chroot_preseed
index 6ce34d3a5..1a70340d8 100755
--- a/scripts/build/lb_chroot_preseed
+++ b/scripts/build/lb_chroot_preseed
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'execute local preseed in chroot')"
diff --git a/scripts/build/lb_chroot_proc b/scripts/build/lb_chroot_proc
index 99785253f..2c13fceb1 100755
--- a/scripts/build/lb_chroot_proc
+++ b/scripts/build/lb_chroot_proc
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'mount /proc')"
diff --git a/scripts/build/lb_chroot_resolv b/scripts/build/lb_chroot_resolv
index 601848917..b82e3667a 100755
--- a/scripts/build/lb_chroot_resolv
+++ b/scripts/build/lb_chroot_resolv
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /etc/resolv.conf')"
diff --git a/scripts/build/lb_chroot_selinuxfs b/scripts/build/lb_chroot_selinuxfs
index 76aa3c9b1..20e30fb35 100755
--- a/scripts/build/lb_chroot_selinuxfs
+++ b/scripts/build/lb_chroot_selinuxfs
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'mount /selinux')"
diff --git a/scripts/build/lb_chroot_sysfs b/scripts/build/lb_chroot_sysfs
index 2c532710e..409728429 100755
--- a/scripts/build/lb_chroot_sysfs
+++ b/scripts/build/lb_chroot_sysfs
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'mount /sys')"
diff --git a/scripts/build/lb_chroot_sysv-rc b/scripts/build/lb_chroot_sysv-rc
index 572f4eb3b..4e1fc160e 100755
--- a/scripts/build/lb_chroot_sysv-rc
+++ b/scripts/build/lb_chroot_sysv-rc
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /usr/sbin/policy-rc.d')"
diff --git a/scripts/build/lb_chroot_tmpfs b/scripts/build/lb_chroot_tmpfs
index db3a4e0da..80311f531 100755
--- a/scripts/build/lb_chroot_tmpfs
+++ b/scripts/build/lb_chroot_tmpfs
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'use tmpfs to speedup the build')"
diff --git a/scripts/build/lb_chroot_upstart b/scripts/build/lb_chroot_upstart
index 2e43636c9..fd7c72f75 100755
--- a/scripts/build/lb_chroot_upstart
+++ b/scripts/build/lb_chroot_upstart
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'manage /sbin/initctl')"
diff --git a/scripts/build/lb_clean b/scripts/build/lb_clean
index 10450644d..4104e5256 100755
--- a/scripts/build/lb_clean
+++ b/scripts/build/lb_clean
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Read meta config
 if [ "${1}" != "noauto" ] && [ -x auto/clean ]
diff --git a/scripts/build/lb_config b/scripts/build/lb_config
index 50416382b..2a1ae567b 100755
--- a/scripts/build/lb_config
+++ b/scripts/build/lb_config
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 PROGRAM="lb config"
diff --git a/scripts/build/lb_source b/scripts/build/lb_source
index a23681770..d52e8d41f 100755
--- a/scripts/build/lb_source
+++ b/scripts/build/lb_source
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Automatically populating config tree
 if [ -x auto/config ] && [ ! -e .build/config ]
diff --git a/scripts/build/lb_source_checksums b/scripts/build/lb_source_checksums
index 681cc102c..cf9cce0dc 100755
--- a/scripts/build/lb_source_checksums
+++ b/scripts/build/lb_source_checksums
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'create source checksums')"
diff --git a/scripts/build/lb_source_debian b/scripts/build/lb_source_debian
index 31c8549c5..95a155d88 100755
--- a/scripts/build/lb_source_debian
+++ b/scripts/build/lb_source_debian
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'debian sources')"
diff --git a/scripts/build/lb_source_debian-live b/scripts/build/lb_source_debian-live
index 9e647c362..868d9d972 100755
--- a/scripts/build/lb_source_debian-live
+++ b/scripts/build/lb_source_debian-live
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'copy debian-live config into source')"
diff --git a/scripts/build/lb_source_disk b/scripts/build/lb_source_disk
index 67d79a159..e51b74df3 100755
--- a/scripts/build/lb_source_disk
+++ b/scripts/build/lb_source_disk
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'install disk information into source')"
diff --git a/scripts/build/lb_source_hdd b/scripts/build/lb_source_hdd
index 268860d52..0d764079c 100755
--- a/scripts/build/lb_source_hdd
+++ b/scripts/build/lb_source_hdd
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build source image')"
diff --git a/scripts/build/lb_source_iso b/scripts/build/lb_source_iso
index bfe63b410..a9f0c281f 100755
--- a/scripts/build/lb_source_iso
+++ b/scripts/build/lb_source_iso
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build iso source image')"
diff --git a/scripts/build/lb_source_tar b/scripts/build/lb_source_tar
index 2033a0e50..0ef302e44 100755
--- a/scripts/build/lb_source_tar
+++ b/scripts/build/lb_source_tar
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build source tarball')"
diff --git a/scripts/build/lb_source_virtual-hdd b/scripts/build/lb_source_virtual-hdd
index 2f019dba6..d37fa9aa0 100755
--- a/scripts/build/lb_source_virtual-hdd
+++ b/scripts/build/lb_source_virtual-hdd
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'build source image')"
diff --git a/scripts/build/lb_testroot b/scripts/build/lb_testroot
index d299074a8..9ded104c9 100755
--- a/scripts/build/lb_testroot
+++ b/scripts/build/lb_testroot
@@ -11,7 +11,7 @@
 set -e
 
 # Including common functions
-. "${LIVE_BUILD}/scripts/build.sh" > /dev/null 2>&1 || . /usr/lib/live/build.sh
+[ -e "${LIVE_BUILD}/scripts/build.sh" ] && . "${LIVE_BUILD}/scripts/build.sh" || . /usr/lib/live/build.sh
 
 # Setting static variables
 DESCRIPTION="$(Echo 'ensure that a system is built as root')"