1 files changed, 5 insertions, 6 deletions

diff --git a/overlays/nftables-prometheus-exporter/default.nix b/overlays/nftables-prometheus-exporter/default.nix
index aab0c8e9..48f668c4 100644
--- a/overlays/nftables-prometheus-exporter/default.nix
+++ b/overlays/nftables-prometheus-exporter/default.nix
@@ -1,17 +1,16 @@
 { final, prev, ... }:
 let
   inpPython = final.python310;
+  python = inpPython.withPackages (ps: with ps; []);
 in {
   nftables-prometheus-exporter = prev.stdenv.mkDerivation rec {
     name = "nftables-prometheus-exporter";
-    src = ./nftables-prometheus-exporter.py;
+    src = prev.replaceVars ./nftables-prometheus-exporter.py { inherit python; };
 
-    phases = [ "buildPhase" "checkPhase" "installPhase" ];
+    phases = [ "unpackPhase" "checkPhase" "installPhase" ];
 
-    python = inpPython.withPackages (ps: with ps; []);
-
-    buildPhase = ''
-      substituteAll $src nftables-prometheus-exporter
+    unpackPhase = ''
+      cp $src nftables-prometheus-exporter
     '';
 
     doCheck = true;