libxcrypt: build using perl without libcrypt support

pkgs/top-level/all-packages.nix

···
 
   libx86 = callPackage ../development/libraries/libx86 {};
 
-  libxcrypt = callPackage ../development/libraries/libxcrypt { };
+  libxcrypt = callPackage ../development/libraries/libxcrypt {
+    perl = perl.override { enableCrypt = false; };
+  };
 
   libxdg_basedir = callPackage ../development/libraries/libxdg-basedir { };