diff --git a/pkgs/os-specific/linux/pam/default.nix b/pkgs/os-specific/linux/pam/default.nix
index 1e2d20c1edb5..e8fc1081ad35 100644
--- a/pkgs/os-specific/linux/pam/default.nix
+++ b/pkgs/os-specific/linux/pam/default.nix
@@ -17,6 +17,10 @@ stdenv.mkDerivation {
   crossAttrs = {
     # Skip libxcrypt cross-building, as it fails for mips and armv5tel
     propagatedBuildInputs = [ flex.hostDrv cracklib.hostDrv ];
+    preConfigure = ''
+      ar x ${flex.hostDrv}/lib/libfl.a
+      export LDFLAGS="$LDFLAGS $PWD/libyywrap.o"
+    '';
   };
 
   postInstall = ''