Author: Michael Tokarev <mjt@tls.msk.ru>
Description: readlink and basename are in /bin not /usr/bin on debian (Closes: #766416).
 This is a debian-specific change, upstream ships
 the rule to use /usr/bin/$foo while on debian
 it is /bin/$foo

diff -Naurp mdadm.orig/udev-md-raid-arrays.rules mdadm/udev-md-raid-arrays.rules
--- mdadm.orig/udev-md-raid-arrays.rules
+++ mdadm/udev-md-raid-arrays.rules
@@ -37,9 +37,9 @@ ENV{ID_FS_USAGE}=="filesystem|other", EN
 ENV{MD_LEVEL}=="raid[1-9]*", ENV{SYSTEMD_WANTS}+="mdmonitor.service"
 
 # Tell systemd to run mdmon for our container, if we need it.
-ENV{MD_LEVEL}=="raid[1-9]*", ENV{MD_CONTAINER}=="?*", PROGRAM="/usr/bin/readlink $env{MD_CONTAINER}", ENV{MD_MON_THIS}="%c"
-ENV{MD_MON_THIS}=="?*", TEST=="/etc/initrd-release", PROGRAM="/usr/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdmon@initrd-%c.service"
-ENV{MD_MON_THIS}=="?*", TEST!="/etc/initrd-release", PROGRAM="/usr/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdmon@%c.service"
-ENV{RESHAPE_ACTIVE}=="yes", PROGRAM="/usr/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdadm-grow-continue@%c.service"
+ENV{MD_LEVEL}=="raid[1-9]*", ENV{MD_CONTAINER}=="?*", PROGRAM="/bin/readlink $env{MD_CONTAINER}", ENV{MD_MON_THIS}="%c"
+ENV{MD_MON_THIS}=="?*", TEST=="/etc/initrd-release", PROGRAM="/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdmon@initrd-%c.service"
+ENV{MD_MON_THIS}=="?*", TEST!="/etc/initrd-release", PROGRAM="/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdmon@%c.service"
+ENV{RESHAPE_ACTIVE}=="yes", PROGRAM="/bin/basename $env{MD_MON_THIS}", ENV{SYSTEMD_WANTS}+="mdadm-grow-continue@%c.service"
 
 LABEL="md_end"