1 files changed, 5 insertions, 3 deletions
diff --git a/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix b/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
index b5a933432524..c66373e92982 100644
--- a/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
+++ b/nixpkgs/pkgs/servers/monitoring/prometheus/postfix-exporter.nix
@@ -1,5 +1,5 @@
-{ stdenv, buildGoPackage, fetchFromGitHub, systemd, makeWrapper
-, withSystemdSupport ? true }:
+{ stdenv, lib, buildGoPackage, fetchFromGitHub, makeWrapper, nixosTests
+, systemd, withSystemdSupport ? true }:
 
 with stdenv.lib;
 
@@ -44,9 +44,11 @@ buildGoPackage rec {
 
   postInstall = optionalString withSystemdSupport ''
     wrapProgram $out/bin/postfix_exporter \
-      --prefix LD_LIBRARY_PATH : "${systemd.lib}/lib"
+      --prefix LD_LIBRARY_PATH : "${lib.getLib systemd}/lib"
   '';
 
+  passthru.tests = { inherit (nixosTests.prometheus-exporters) postfix; };
+
   meta = {
     inherit (src.meta) homepage;
     description = "A Prometheus exporter for Postfix";