diff --git a/pkgs/os-specific/linux/pam_unix2/default.nix b/pkgs/os-specific/linux/pam_unix2/default.nix
index 4d125d5ab83..d48598afd0d 100644
--- a/pkgs/os-specific/linux/pam_unix2/default.nix
+++ b/pkgs/os-specific/linux/pam_unix2/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation {
     sha256 = "067xnyd3q8ik73glxwyx1lydk4bgl78lzq44mnqqp4jrpnpd04ml";
   };
 
-  buildInputs = [ pam libxcrypt ];
+  buildInputs = [ pam ] ++ stdenv.lib.optional (stdenv.system != "armv5tel-linux") libxcrypt;
 
   meta = {
     homepage = ftp://ftp.suse.com/pub/people/kukuk/pam/pam_unix2;