1 files changed, 5 insertions, 6 deletions

diff --git a/overlays/zte-prometheus-exporter/default.nix b/overlays/zte-prometheus-exporter/default.nix
index 2188e7b3..cd4207cd 100644
--- a/overlays/zte-prometheus-exporter/default.nix
+++ b/overlays/zte-prometheus-exporter/default.nix
@@ -2,17 +2,16 @@
 let
   packageOverrides = final.callPackage ./python-packages.nix {};
   inpPython = final.python310.override { inherit packageOverrides; };
+  python = inpPython.withPackages (ps: with ps; [pytimeparse requests]);
 in {
   zte-prometheus-exporter = prev.stdenv.mkDerivation rec {
     name = "zte-prometheus-exporter";
-    src = ./zte-prometheus-exporter.py;
+    src = prev.replaceVars ./zte-prometheus-exporter.py { inherit python; };
 
-    phases = [ "buildPhase" "checkPhase" "installPhase" ];
+    phases = [ "unpackPhase" "checkPhase" "installPhase" ];
 
-    python = inpPython.withPackages (ps: with ps; [pytimeparse requests]);
-
-    buildPhase = ''
-      substituteAll $src zte-prometheus-exporter
+    unpackPhase = ''
+      cp $src zte-prometheus-exporter
     '';
 
     doCheck = true;