diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index bf0b512fa1ea..7837406f8d46 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -776,7 +776,7 @@ rec {
           mkdir $out
 
           fakeroot bash -c '
-            set -e
+            source $stdenv/setup
             cd old_out
             eval "$fakeRootCommands"
             tar \