diff --git a/pkgs/stdenv/nix/prehook.sh b/pkgs/stdenv/nix/prehook.sh
index 35adc3745dcd..c72dd6e93a01 100644
--- a/pkgs/stdenv/nix/prehook.sh
+++ b/pkgs/stdenv/nix/prehook.sh
@@ -6,4 +6,5 @@ if test "$system" = "i686-darwin" -o "$system" = "powerpc-darwin"; then
     export NIX_NO_SELF_RPATH=1
     dontFixLibtool=1
     NIX_STRIP_DEBUG=0 # !!! do we still need this?
+    stripAllFlags=" " # the Darwin "strip" command doesn't know "-s" 
 fi