diff --git a/pkgs/tools/filesystems/nixpart/0.4/blivet.nix b/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
index b05abd72bac7..6ba29cb98d40 100644
--- a/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
+++ b/pkgs/tools/filesystems/nixpart/0.4/blivet.nix
@@ -30,7 +30,7 @@ buildPythonApplication rec {
     sed -i -e 's|"lsof"|"${lsof}/bin/lsof"|' blivet/formats/fs.py
     sed -i -r -e 's|"(u?mount)"|"${utillinux.bin}/bin/\1"|' blivet/util.py
     sed -i -e '/find_library/,/find_library/ {
-      c libudev = "${systemd.lib}/lib/libudev.so.1"
+      c libudev = "${stdenv.lib.getLib systemd}/lib/libudev.so.1"
     }' blivet/pyudev.py
   '';
 
diff --git a/pkgs/tools/filesystems/nixpart/0.4/multipath-tools.nix b/pkgs/tools/filesystems/nixpart/0.4/multipath-tools.nix
index ffed57e6345e..36525e6fa3cd 100644
--- a/pkgs/tools/filesystems/nixpart/0.4/multipath-tools.nix
+++ b/pkgs/tools/filesystems/nixpart/0.4/multipath-tools.nix
@@ -36,8 +36,8 @@ stdenv.mkDerivation rec {
       substituteInPlace kpartx/kpartx.rules --replace /sbin/kpartx $out/sbin/kpartx
       substituteInPlace kpartx/kpartx_id --replace /sbin/dmsetup ${lvm2}/sbin/dmsetup
 
-      substituteInPlace libmultipath/defaults.h --replace /lib/udev/scsi_id ${systemd.lib}/lib/udev/scsi_id
-      substituteInPlace libmultipath/hwtable.c --replace /lib/udev/scsi_id ${systemd.lib}/lib/udev/scsi_id
+      substituteInPlace libmultipath/defaults.h --replace /lib/udev/scsi_id ${stdenv.lib.getLib systemd}/lib/udev/scsi_id
+      substituteInPlace libmultipath/hwtable.c --replace /lib/udev/scsi_id ${stdenv.lib.getLib systemd}/lib/udev/scsi_id
 
       sed -i -re '
          s,^( *#define +DEFAULT_MULTIPATHDIR\>).*,\1 "'"$out/lib/multipath"'",