diff --git a/pkgs/build-support/build-bazel-package/default.nix b/pkgs/build-support/build-bazel-package/default.nix
index 61befff3eaa..31c0c8e92e5 100644
--- a/pkgs/build-support/build-bazel-package/default.nix
+++ b/pkgs/build-support/build-bazel-package/default.nix
@@ -45,6 +45,8 @@ in stdenv.mkDerivation (fBuildAttrs // {
     name = "${name}-deps.tar.gz";
     inherit bazelFlags bazelBuildFlags bazelFetchFlags bazelTarget;
 
+    impureEnvVars = lib.fetchers.proxyImpureEnvVars;
+
     nativeBuildInputs = fFetchAttrs.nativeBuildInputs or [] ++ [ bazel ];
 
     preHook = fFetchAttrs.preHook or "" + ''