diff --git a/pkgs/development/libraries/kerberos/heimdal.nix b/pkgs/development/libraries/kerberos/heimdal.nix
index 19d4a7893f2..b0a5ecedcc6 100644
--- a/pkgs/development/libraries/kerberos/heimdal.nix
+++ b/pkgs/development/libraries/kerberos/heimdal.nix
@@ -19,7 +19,7 @@ stdenv.mkDerivation rec {
   ];
   # dont succeed with --libexec=$out/sbin, so
   postInstall = ''
-    mv $out/libexec/* $out/sbin/
+    mv "$out/libexec/"* $out/sbin/
     rmdir $out/libexec
   '';