diff --git a/builder/default.nix b/builder/default.nix
index 170d32b..2310fa5 100644
--- a/builder/default.nix
+++ b/builder/default.nix
@@ -260,7 +260,7 @@ let
             echo "$d" | grep -q "\(/_\|examples\|Godeps\|testdata\)" && return 0
             [ -n "$excludedPackages" ] && echo "$d" | grep -q "$excludedPackages" && return 0
             local OUT
-            if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" -v -p $NIX_BUILD_CORES $d 2>&1)"; then
+            if ! OUT="$(go $cmd $buildFlags "''${buildFlagsArray[@]}" ''${ldflags:+-ldflags="$ldflags"} -v -p $NIX_BUILD_CORES $d 2>&1)"; then
               if echo "$OUT" | grep -qE 'imports .*?: no Go files in'; then
                 echo "$OUT" >&2
                 return 1