diff --git a/pkgs/os-specific/linux/libselinux/default.nix b/pkgs/os-specific/linux/libselinux/default.nix
index 9a19fcb067a..a836d6baec1 100644
--- a/pkgs/os-specific/linux/libselinux/default.nix
+++ b/pkgs/os-specific/linux/libselinux/default.nix
@@ -35,6 +35,7 @@ stdenv.mkDerivation rec {
     "MAN3DIR=$(man)/share/man/man3"
     "MAN5DIR=$(man)/share/man/man5"
     "MAN8DIR=$(man)/share/man/man8"
+    "PYTHONLIBDIR=$(py)/${python.sitePackages}"
     "SBINDIR=$(bin)/sbin"
     "SHLIBDIR=$(out)/lib"
 
@@ -43,10 +44,6 @@ stdenv.mkDerivation rec {
 
   installTargets = [ "install" ] ++ optional enablePython "install-pywrap";
 
-  postInstall = ''
-    moveToOutput "${python.sitePackages}" "$py"
-  '';
-
   meta = removeAttrs libsepol.meta ["outputsToInstall"] // {
     description = "SELinux core library";
   };