diff --git a/pkgs/by-name/pr/prometheus/package.nix b/pkgs/by-name/pr/prometheus/package.nix
index 7388b7a2bf94..447956b6f3da 100644
--- a/pkgs/by-name/pr/prometheus/package.nix
+++ b/pkgs/by-name/pr/prometheus/package.nix
@@ -90,6 +90,8 @@ buildGoModule (finalAttrs: {
     src
     ;
 
+  proxyVendor = true;
+
   outputs = [
     "out"
     "doc"