diff --git a/pkgs/tools/system/acct/default.nix b/pkgs/tools/system/acct/default.nix
index d616b35ae60..0ad31c74535 100644
--- a/pkgs/tools/system/acct/default.nix
+++ b/pkgs/tools/system/acct/default.nix
@@ -23,5 +23,6 @@ stdenv.mkDerivation rec {
     homepage = http://www.gnu.org/software/acct/;
 
     maintainers = [ stdenv.lib.maintainers.ludo ];
+    platforms = stdenv.lib.platforms.allBut "i686-cygwin";
   };
 }