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nix-scripts/artiq/pkgs/artiq-timestamp.nix

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{ pkgs ? import <nixpkgs> {} }:
with pkgs;
let
artiq-timestamp = stdenv.mkDerivation {
name = "artiq-timestamp";
src = import ./artiq-src.nix { inherit fetchgit; };
buildInputs = [ git ];
buildPhase = ''
TIMESTAMP=`${git}/bin/git log -1 --format=%ct`
'';
installPhase = ''
echo \"$TIMESTAMP\" > $out
'';
};
in
builtins.readFile artiq-timestamp