diff --git a/pkgs/development/tools/misc/ninka/default.nix b/pkgs/development/tools/misc/ninka/default.nix
index f4bf098bbede..9ca0ced30930 100644
--- a/pkgs/development/tools/misc/ninka/default.nix
+++ b/pkgs/development/tools/misc/ninka/default.nix
@@ -1,5 +1,7 @@
 {stdenv, fetchgit, perl}:
 
+assert stdenv ? glibc;
+
 let
   rev = "7a9a5c48ede207eec881";
 in
diff --git a/pkgs/servers/mail/freepops/default.nix b/pkgs/servers/mail/freepops/default.nix
index e0e0bc5fe57e..d58660297623 100644
--- a/pkgs/servers/mail/freepops/default.nix
+++ b/pkgs/servers/mail/freepops/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation {
   '';
 
   meta = {
-    description = "FreePOPs is an extensible pop3 server.";
+    description = "An extensible pop3 server";
     longDescription = ''
       FreePOPs is an extensible pop3 server. Its main purpose is to provide
       a pop3 interface to a webmail.