TODO: fix path to blkid as well.

Currently we set it to /sbin/blkid because in nixos we fix a lot of references
to /sbin/blkid anyway.

diff --git a/udev/10-dm.rules.in b/udev/10-dm.rules.in
index 605e088..8865d54 100644
--- a/udev/10-dm.rules.in
+++ b/udev/10-dm.rules.in
@@ -19,9 +19,8 @@ KERNEL=="device-mapper", NAME="(DM_DIR)/control"
 SUBSYSTEM!="block", GOTO="dm_end"
 KERNEL!="dm-[0-9]*", GOTO="dm_end"
 
-# Set proper sbin path, /sbin has higher priority than /usr/sbin.
-ENV{DM_SBIN_PATH}="/sbin"
-TEST!="$env{DM_SBIN_PATH}/dmsetup", ENV{DM_SBIN_PATH}="/usr/sbin"
+# Set proper sbin path. Exit if dmsetup is not present.
+ENV{DM_SBIN_PATH}="(sbindir)"
 TEST!="$env{DM_SBIN_PATH}/dmsetup", GOTO="dm_end"
 
 # Device created, major and minor number assigned - "add" event generated.
diff --git a/udev/13-dm-disk.rules b/udev/13-dm-disk.rules
index 271ca22..cdc583f 100644
--- a/udev/13-dm-disk.rules
+++ b/udev/13-dm-disk.rules
@@ -19,7 +19,7 @@ ENV{DM_UUID}=="?*", SYMLINK+="disk/by-id/dm-uuid-$env{DM_UUID}"
 
 ENV{DM_SUSPENDED}=="1", GOTO="dm_end"
 
-IMPORT{program}="$env{DM_SBIN_PATH}/blkid -o udev -p $tempnode"
+IMPORT{program}="/sbin/blkid -o udev -p $tempnode"
 ENV{DM_UDEV_LOW_PRIORITY_FLAG}=="1", OPTIONS="link_priority=-100"
 ENV{ID_FS_USAGE}=="filesystem|other|crypto", ENV{ID_FS_UUID_ENC}=="?*", SYMLINK+="disk/by-uuid/$env{ID_FS_UUID_ENC}"
 ENV{ID_FS_USAGE}=="filesystem|other", ENV{ID_FS_LABEL_ENC}=="?*", SYMLINK+="disk/by-label/$env{ID_FS_LABEL_ENC}"
diff --git a/udev/Makefile.in b/udev/Makefile.in
index 11635bb..49cf732 100644
--- a/udev/Makefile.in
+++ b/udev/Makefile.in
@@ -12,6 +12,7 @@
 # Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
 srcdir = @srcdir@
+sbindir = @sbindir@
 top_srcdir = @top_srcdir@
 top_builddir = @top_builddir@
 
@@ -26,7 +27,7 @@ include $(top_builddir)/make.tmpl
 vpath %.rules $(srcdir)
 
 %.rules: %.rules.in
-	$(SED) -e "s/(DM_DIR)/$(DM_DIR)/" $< >$@
+	$(SED) -e "s/(DM_DIR)/$(DM_DIR)/" -e "s|(sbindir)|$(sbindir)|" $< >$@
 
 %_install: %.rules
 	$(INSTALL_DATA) -D $< $(udevdir)/$(<F)