LnL7

{ config, pkgs, ... }:

let
  # Import unstable channel.
  # sudo nix-channel --add http://nixos.org/channels/nixpkgs-unstable nixpkgs-unstable
  # sudo nix-channel --update nixpkgs-unstable
  unstable = import <nixpkgs-unstable> {};
in

{

LnL7

self: super:

{
  # Install overlay:
  # $ mkdir -p ~/.config/nixpkgs/overlays
  # $ curl https://gist.githubusercontent.com/LnL7/570349866bb69467d0caf5cb175faa74/raw/3f3d53fe8e8713ee321ee894ecf76edbcb0b3711/lnl-overlay.nix -o ~/.config/nixpkgs/overlays/lnl.nix
  userPackages = super.userPackages or {} // {

    # Example:
    hello = self.hello;

LnL7

self: super:

let
  # Import unstable channel.
  # $ sudo nix-channel --add http://nixos.org/channels/nixpkgs-unstable nixpkgs-unstable
  # $ sudo nix-channel --update nixpkgs-unstable
  unstable = import <nixpkgs-unstable> {};
in

{

LnL7

{ config, pkgs, ... }:

{
  services.xserver.displayManager.sessionCommands = ''
    ${pkgs.xlibs.xset}/bin/xset r rate 200 40
    ${pkgs.xlibs.setxkbmap}/bin/setxkbmap -layout us -option ctrl:nocaps
  '';
}

LnL7

self: super:

{
  linuxPackagesFor = kernel: (super.linuxPackagesFor kernel).extend (self: super: {
    foo = self.callPackage ./foo.nix {};
  });
}

LnL7

#!/bin/sh

printf "checking for nixbld group... "
/usr/bin/dscl . -read /Groups/nixbld &> /dev/null
case $? in
  0) echo "yes" ;;
  56)
    echo "no, created"
    sudo /usr/sbin/dseditgroup -o create -r "Nix build group for nix-daemon" -i 30000 nixbld >&2 || exit
    ;;

LnL7

let
  builder = "${builtins.storePath <bash>}/bin/bash";
in

{
  # nix-build basic.nix -A foo -I bash=$(nix-build '<nixpkgs>' -A bash --no-out-link)
  foo = derivation {
    name = "foo-0.0.0";
    inherit builder;
    args = ["-c" "echo 42 > $out"];

LnL7

:u() {
     local exports

     exports=$(direnv apply_dump <(nix-shell -E "with import <nixpkgs> {}; mkShell { buildInputs = [ $* ]; }" --run 'direnv dump'))
     eval "$exports"

     name+="''${name:+ }$*"
     typeset -U PATH
 }

LnL7

diff --git a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
index 761ff3ea925..a8f667dcbe7 100644
--- a/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
+++ b/pkgs/os-specific/darwin/apple-source-releases/ICU/default.nix
@@ -20,4 +20,8 @@ appleDerivation {
     mv $out/usr/local/include $out/include
     rm -rf $out/usr
   '';
+
+  failureHook = ''

LnL7

diff --git a/src/libstore/globals.cc b/src/libstore/globals.cc
index aa694577d..504ae6ebd 100644
--- a/src/libstore/globals.cc
+++ b/src/libstore/globals.cc
@@ -207,6 +207,16 @@ std::string listLogFormats()
     return res;
 }
 
+LogFormatSetting::LogFormatSetting(Config * options,
+        LogFormat def,