diff --git a/pkgs/index.nix b/pkgs/index.nix
index 1d481a14..d8ac4977 100644
--- a/pkgs/index.nix
+++ b/pkgs/index.nix
@@ -42,6 +42,7 @@ let
     #pscom = callPackage ./parastation/pscom.nix { }; # Unmaintaned
     #psmpi = callPackage ./parastation/psmpi.nix { }; # Unmaintaned
     prometheus-slurm-exporter = prev.callPackage ./prometheus-slurm-exporter/default.nix { };
+    slurm = callPackage ./slurm/default.nix { };
     sonar = callPackage ./sonar/default.nix { };
     stdenvClangOmpss2 = final.stdenv.override { cc = final.clangOmpss2; allowedRequisites = null; };
     stdenvClangOmpss2Nanos6 = final.stdenv.override { cc = final.clangOmpss2Nanos6; allowedRequisites = null; };
diff --git a/pkgs/overlay.nix b/pkgs/overlay.nix
index 72c7b070..3f816834 100644
--- a/pkgs/overlay.nix
+++ b/pkgs/overlay.nix
@@ -1,21 +1,3 @@
 final: prev:
 {
-  slurm = prev.slurm.overrideAttrs (old: {
-    patches = (old.patches or []) ++ [
-      # See https://bugs.schedmd.com/show_bug.cgi?id=19324
-      ./slurm-rank-expansion.patch
-    ];
-    # Install also the pam_slurm_adopt library to restrict users from accessing
-    # nodes with no job allocated.
-    postBuild = (old.postBuild or "") + ''
-      pushd contribs/pam_slurm_adopt
-        make "PAM_DIR=$out/lib/security"
-      popd
-    '';
-    postInstall = (old.postInstall or "") + ''
-      pushd contribs/pam_slurm_adopt
-        make "PAM_DIR=$out/lib/security" install
-      popd
-    '';
-  });
 }
diff --git a/pkgs/slurm/default.nix b/pkgs/slurm/default.nix
new file mode 100644
index 00000000..5e0a24c9
--- /dev/null
+++ b/pkgs/slurm/default.nix
@@ -0,0 +1,20 @@
+{ slurm }:
+
+slurm.overrideAttrs (old: {
+  patches = (old.patches or []) ++ [
+    # See https://bugs.schedmd.com/show_bug.cgi?id=19324
+    ./slurm-rank-expansion.patch
+  ];
+  # Install also the pam_slurm_adopt library to restrict users from accessing
+  # nodes with no job allocated.
+  postBuild = (old.postBuild or "") + ''
+    pushd contribs/pam_slurm_adopt
+      make "PAM_DIR=$out/lib/security"
+    popd
+  '';
+  postInstall = (old.postInstall or "") + ''
+    pushd contribs/pam_slurm_adopt
+      make "PAM_DIR=$out/lib/security" install
+    popd
+  '';
+}