Pillars of Eternity on nixos

nix.sh

#!/usr/bin/env bash

read -r -d '' NIXEXPR <<EOF
with import <nixpkgs> {};
runCommand "foo" {} ''
mkdir \$out
echo "\${lib.makeLibraryPath [ mesa xorg.libX11 xorg.libXext xorg.libXcursor xorg.libXrandr pkgsi686Linux.alsaPlugins libpulseaudio stdenv.cc.cc.lib ]}" > \$out/path
cp \$NIX_CC/nix-support/dynamic-linker \$out/ld
''
EOF

f=$(nix-build -E "$NIXEXPR")
if [[ -z "$f" ]]; then
  echo "could not build nixexpr"
  exit 1
fi

exe=./game/PillarsOfEternity
patchelfPath="$(nix-build -A patchelf '<nixpkgs>')"
patchelf="$patchelfPath/bin/patchelf"
if [[ -z "$patchelfPath" ]]; then
  echo "could not build patchelf"
  exit 1
fi

oldinterpr=$($patchelf --print-interpreter "$exe")
newinterpr=$(cat "$f/ld")
if [[ "$oldinterpr" != "$newinterpr" ]]; then
    echo "patching $exe from $oldinterpr to $newinterpr"
    $patchelf --set-interpreter "$newinterpr" "$exe"
fi

LPATH=$(cat "$f/path")
env LD_LIBRARY_PATH=$LPATH bash start.sh

Will this technically work with any Unity-produced Linux executable? (Changing the executable name on line 18, of course)

$NIX_CC seems empty, and I don't know why

@dpc replace runCommand with runCommandCC then it should work again.