diff --git a/pkgs/build-support/fetchdocker/credentials.nix b/pkgs/build-support/fetchdocker/credentials.nix
index da1984832684..f8a229ccb6bb 100644
--- a/pkgs/build-support/fetchdocker/credentials.nix
+++ b/pkgs/build-support/fetchdocker/credentials.nix
@@ -1,3 +1,4 @@
+{ lib }:
 # We provide three paths to get the credentials into the builder's
 # environment:
 #
diff --git a/pkgs/build-support/fetchdocker/generic-fetcher.nix b/pkgs/build-support/fetchdocker/generic-fetcher.nix
index 6a7b977db29f..95b193490a82 100644
--- a/pkgs/build-support/fetchdocker/generic-fetcher.nix
+++ b/pkgs/build-support/fetchdocker/generic-fetcher.nix
@@ -1,7 +1,7 @@
 { stdenv, lib, haskellPackages, writeText, gawk }:
 let
   awk                   = "${gawk}/bin/awk";
-  dockerCredentialsFile = import ./credentials.nix;
+  dockerCredentialsFile = import ./credentials.nix { inherit lib; };
 in
 { fetcher
 , name