nixpkgs/pkgs/os-specific/linux/bbswitch/default.nix

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{ stdenv, fetchurl, kernel }:
let
baseName = "bbswitch-0.4.2";
name = "${baseName}-${kernel.version}";
in
stdenv.mkDerivation {
inherit name;
src = fetchurl {
url = "http://github.com/downloads/Bumblebee-Project/bbswitch/${baseName}.tar.gz";
sha256 = "06j3cm1rk3lcbv54k0magrijykrzmkrna8n5cc274iz59842lga3";
};
preBuild = ''
substituteInPlace Makefile \
--replace "\$(shell uname -r)" "${kernel.modDirVersion}" \
--replace "/lib/modules" "${kernel}/lib/modules"
'';
installPhase = ''
ensureDir $out/lib/modules/${kernel.modDirVersion}/misc
cp bbswitch.ko $out/lib/modules/${kernel.modDirVersion}/misc
ensureDir $out/bin
tee $out/bin/discrete_vga_poweroff << EOF
#!/bin/sh
echo -n OFF > /proc/acpi/bbswitch
EOF
tee $out/bin/discrete_vga_poweron << EOF
#!/bin/sh
echo -n ON > /proc/acpi/bbswitch
EOF
chmod +x $out/bin/discrete_vga_poweroff $out/bin/discrete_vga_poweron
'';
meta = {
platforms = stdenv.lib.platforms.linux;
description = "A module for powering off hybrid GPUs";
};
}