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let nixpkgs_unstable = import (builtins.fetchTarball {
# FIXME: upgrade to nixpkgs 19 when stable and stick to stable
# versions
name = "nixos-unstable-2018-12-08";
url = https://github.com/nixos/nixpkgs/archive/61c3169a0e17d789c566d5b241bfe309ce4a6275.tar.gz;
sha256 = "0qbycg7wkb71v20rchlkafrjfpbk2fnlvvbh3ai9pyfisci5wxvq";
}) {};
in
with nixpkgs_unstable;
{
inherit nixpkgs_unstable;
fetchedGithub = path:
let
json = lib.importJSON path;
in rec {
version = json.tag;
name = "${json.meta.name}-${version}";
src = fetchFromGitHub json.github;
};
fetchedGit = path:
let
json = lib.importJSON path;
in rec {
version = json.tag;
name = "${json.meta.name}-${version}";
src = fetchgit json.git;
};
checkEnv = var: builtins.stringLength (builtins.getEnv var) > 0;
}
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