Merge master into closure-size

The kde-5 stuff still didn't merge well.
I hand-fixed what I saw, but there may be more problems.

pkgs/shells/fish/default.nix

@@ -1,5 +1,5 @@
 { stdenv, fetchurl, ncurses, nettools, python, which, groff, gettext, man_db,
-  bc, libiconv, coreutils, gnused, kbd }:
+  bc, libiconv, coreutils, gnused, kbd, utillinux, glibc }:
 
 stdenv.mkDerivation rec {
   name = "fish-${version}";
@@ -22,8 +22,10 @@ stdenv.mkDerivation rec {
 
   postInstall = ''
     sed -e "s|expr|${coreutils}/bin/expr|" \
+  '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
         -e "s|if which unicode_start|if true|" \
         -e "s|unicode_start|${kbd}/bin/unicode_start|" \
+  '' + ''
         -i "$out/etc/fish/config.fish"
     sed -e "s|bc|${bc}/bin/bc|" \
         -e "s|/usr/bin/seq|${coreutils}/bin/seq|" \
@@ -43,6 +45,13 @@ stdenv.mkDerivation rec {
            "$out/share/fish/functions/prompt_pwd.fish"
     substituteInPlace "$out/share/fish/functions/fish_default_key_bindings.fish" \
       --replace "clear;" "${ncurses}/bin/clear;"
+  '' + stdenv.lib.optionalString stdenv.isLinux ''
+    substituteInPlace "$out/share/fish/functions/__fish_print_help.fish" \
+      --replace "| ul" "| ${utillinux}/bin/ul" 
+
+    for cur in $out/share/fish/functions/*.fish; do
+      substituteInPlace "$cur" --replace "/usr/bin/getent" "${glibc}/bin/getent" 
+    done
   '' + stdenv.lib.optionalString (!stdenv.isDarwin) ''
     sed -i "s|(hostname\||(${nettools}/bin/hostname\||" "$out/share/fish/functions/fish_prompt.fish"
     sed -i "s|Popen(\['manpath'|Popen(\['${man_db}/bin/manpath'|" "$out/share/fish/tools/create_manpage_completions.py"

pkgs/shells/xonsh/default.nix

@@ -1,6 +1,6 @@
 {stdenv, fetchFromGitHub, python3Packages}:
 
-python3Packages.buildPythonPackage rec {
+python3Packages.buildPythonApplication rec {
   name = "xonsh-${version}";
   version = "0.1.3";