Make i3 compile.

common.nix

@@ -49,7 +49,7 @@
     gnupg
     pass xclip pwgen
     gcc
-    # remmina
+    remmina
     silver-searcher
     tree
     python
@@ -91,6 +91,7 @@
     # libreoffice = pkgs.libreoffice.override { jdk = pkgs.jdk; };  # reuse package cache
     jre = pkgs.openjdk8;
     jdk = pkgs.openjdk8;
+    i3 = pkgs.stdenv.lib.overrideDerivation pkgs.i3 (oldAttrs: { doCheck = false; });
   };
 
   environment.variables.EDITOR = "${pkgs.vim}/bin/vim";