nixpkgs/pkgs/tools/package-management/nix-universal-prefetch/default.nix

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{ stdenv
, fetchFromGitHub
, ruby
}:
# No gems used, so mkDerivation is fine.
stdenv.mkDerivation rec {
pname = "nix-universal-prefetch";
version = "0.2.0";
src = fetchFromGitHub {
owner = "samueldr";
repo = "nix-universal-prefetch";
rev = "v${version}";
sha256 = "1id9iaibrm2d3fa9dkcxnb3sd0j1vh502181gdd199a1cfsmzh1i";
};
installPhase = ''
mkdir -pv $out/bin
cp nix-universal-prefetch $out/bin/nix-universal-prefetch
substituteInPlace "$out/bin/nix-universal-prefetch" \
--replace "/usr/bin/env nix-shell" "${ruby}/bin/ruby"
'';
meta = with stdenv.lib; {
description = "Uses nixpkgs fetchers to figure out hashes";
homepage = https://github.com/samueldr/nix-universal-prefetch;
license = licenses.mit;
maintainers = with maintainers; [ samueldr ];
platforms = platforms.linux ++ platforms.darwin;
};
}