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1let
2 fetcher = { owner, repo, rev, sha256, ... }: builtins.fetchTarball {
3 inherit sha256;
4 url = "https://github.com/${owner}/${repo}/archive/${rev}.tar.gz";
5 };
6
7 inherit (import <nixpkgs> {}) lib;
8
9 versions = lib.mapAttrs
10 (_:fetcher)
11 (builtins.fromJSON (builtins.readFile ./versions.json));
12
13
14
15 nixpkgs = import versions.nixpkgs {};
16
17in
18 import "${versions.ihaskell}/release.nix" {
19 inherit nixpkgs;
20 compiler = "ghc865";
21 packages = self: with self; [
22 papa
23 ];
24 }