lemurs: misc updates (#519912)

pkgs/by-name/le/lemurs/package.nix

@@ -1,10 +1,8 @@
 {
   fetchFromGitHub,
   lib,
-  bash,
   linux-pam,
   rustPlatform,
-  systemdMinimal,
   versionCheckHook,
   nixosTests,
 }:
@@ -22,11 +20,13 @@ rustPlatform.buildRustPackage (finalAttrs: {
   cargoHash = "sha256-XoGtIHYCGXNuwnpDTU7NbZAs6rCO+69CAG89VCv9aAc=";
 
   buildInputs = [
-    bash
     linux-pam
-    systemdMinimal
   ];
 
+  postInstall = ''
+    install -Dm0755 extra/xsetup.sh "$out/etc/xsetup.sh"
+  '';
+
   doInstallCheck = true;
   nativeInstallCheckInputs = [ versionCheckHook ];