diff --git a/hooks/centos4/10-disable-tls b/hooks/centos4/10-disable-tls
index aa7e9df..b7896f6 100755
--- a/hooks/centos4/10-disable-tls
+++ b/hooks/centos4/10-disable-tls
@@ -15,8 +15,8 @@ dist=$2
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/20-setup-yum b/hooks/centos4/20-setup-yum
index bad1a98..13a75b5 100755
--- a/hooks/centos4/20-setup-yum
+++ b/hooks/centos4/20-setup-yum
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/30-fix-inittab b/hooks/centos4/30-fix-inittab
index 98ca9c3..4d72040 100755
--- a/hooks/centos4/30-fix-inittab
+++ b/hooks/centos4/30-fix-inittab
@@ -16,8 +16,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/40-setup-networking b/hooks/centos4/40-setup-networking
index bcdab05..3718685 100755
--- a/hooks/centos4/40-setup-networking
+++ b/hooks/centos4/40-setup-networking
@@ -14,8 +14,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/50-setup-hostname b/hooks/centos4/50-setup-hostname
index c5433ec..533c953 100755
--- a/hooks/centos4/50-setup-hostname
+++ b/hooks/centos4/50-setup-hostname
@@ -15,8 +15,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/55-create-dev b/hooks/centos4/55-create-dev
index c28c38b..0156bf2 100755
--- a/hooks/centos4/55-create-dev
+++ b/hooks/centos4/55-create-dev
@@ -15,8 +15,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/65-copy-user-files b/hooks/centos4/65-copy-user-files
index 94c3d8e..496bc66 100755
--- a/hooks/centos4/65-copy-user-files
+++ b/hooks/centos4/65-copy-user-files
@@ -11,8 +11,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/70-install-ssh b/hooks/centos4/70-install-ssh
index 1524c59..b7fa030 100755
--- a/hooks/centos4/70-install-ssh
+++ b/hooks/centos4/70-install-ssh
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/80-install-modules b/hooks/centos4/80-install-modules
index f1d962e..ca0e0c2 100755
--- a/hooks/centos4/80-install-modules
+++ b/hooks/centos4/80-install-modules
@@ -15,8 +15,8 @@ dist=$2
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/90-make-fstab b/hooks/centos4/90-make-fstab
index 02f152d..bc5b6f1 100755
--- a/hooks/centos4/90-make-fstab
+++ b/hooks/centos4/90-make-fstab
@@ -17,8 +17,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/centos4/99-clean-image b/hooks/centos4/99-clean-image
index 452005e..9bc0ecf 100755
--- a/hooks/centos4/99-clean-image
+++ b/hooks/centos4/99-clean-image
@@ -12,8 +12,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/10-disable-tls b/hooks/debian/10-disable-tls
index 7ee040f..01023a1 100755
--- a/hooks/debian/10-disable-tls
+++ b/hooks/debian/10-disable-tls
@@ -12,8 +12,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/15-disable-hwclock b/hooks/debian/15-disable-hwclock
index e608bac..5dcf04b 100755
--- a/hooks/debian/15-disable-hwclock
+++ b/hooks/debian/15-disable-hwclock
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/20-setup-apt b/hooks/debian/20-setup-apt
index 350d36d..1d0b8b8 100755
--- a/hooks/debian/20-setup-apt
+++ b/hooks/debian/20-setup-apt
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/30-fix-inittab b/hooks/debian/30-fix-inittab
index 98ca9c3..4d72040 100755
--- a/hooks/debian/30-fix-inittab
+++ b/hooks/debian/30-fix-inittab
@@ -16,8 +16,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/40-setup-networking b/hooks/debian/40-setup-networking
index e523361..88ae6ac 100755
--- a/hooks/debian/40-setup-networking
+++ b/hooks/debian/40-setup-networking
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/50-setup-hostname b/hooks/debian/50-setup-hostname
index c5433ec..533c953 100755
--- a/hooks/debian/50-setup-hostname
+++ b/hooks/debian/50-setup-hostname
@@ -15,8 +15,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/55-create-dev b/hooks/debian/55-create-dev
index bcfa993..5c7c420 100755
--- a/hooks/debian/55-create-dev
+++ b/hooks/debian/55-create-dev
@@ -14,8 +14,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/65-copy-user-files b/hooks/debian/65-copy-user-files
index 94c3d8e..496bc66 100755
--- a/hooks/debian/65-copy-user-files
+++ b/hooks/debian/65-copy-user-files
@@ -11,8 +11,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/70-install-ssh b/hooks/debian/70-install-ssh
index a341df5..fbfaa2f 100755
--- a/hooks/debian/70-install-ssh
+++ b/hooks/debian/70-install-ssh
@@ -15,8 +15,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/80-install-modules b/hooks/debian/80-install-modules
index 7e7b41d..be9de8c 100755
--- a/hooks/debian/80-install-modules
+++ b/hooks/debian/80-install-modules
@@ -20,8 +20,8 @@ dist=$2
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/90-make-fstab b/hooks/debian/90-make-fstab
index eb9f194..9c5689a 100755
--- a/hooks/debian/90-make-fstab
+++ b/hooks/debian/90-make-fstab
@@ -17,8 +17,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi
 
 
diff --git a/hooks/debian/99-clean-image b/hooks/debian/99-clean-image
index aac7b59..58c634b 100755
--- a/hooks/debian/99-clean-image
+++ b/hooks/debian/99-clean-image
@@ -13,8 +13,8 @@ prefix=$1
 #
 #  Source our common functions
 #
-if [ -e ../common.sh ]; then
-    . ../common.sh
+if [ -e /usr/lib/xen-tools/common.sh ]; then
+    . /usr/lib/xen-tools/common.sh
 fi