From d7cdea2dd784d5bd5e0acb5766656e77da285049 Mon Sep 17 00:00:00 2001
From: Justin Bedo <cu@cua0.org>
Date: Thu, 3 Aug 2023 23:36:14 +1000
Subject: switch to cloudflare zlib

---
 default.nix |  5 +++++
 flake.lock  | 17 +++++++++++++++++
 flake.nix   | 16 ++++++++++++++--
 3 files changed, 36 insertions(+), 2 deletions(-)

diff --git a/default.nix b/default.nix
index 5582923..3e5d617 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,8 @@
 {
+  cloudflareZlib ? (builtins.fetchTarball {
+    url = "https://github.com/cloudflare/zlib/archive/d20bdfcd0efbdd72cb9d857e098ceac1bad41432.tar.gz";
+    sha256 = "sha256-KNS1FDznR2UaXo0WBOUh4lnVY23Kc9JnNyVtYzSpWDw=";
+  }),
   pkgs ?
     import (builtins.fetchTarball {
       url = "https://github.com/nixos/nixpkgs/archive/356c6dcdf37cfb4162f534e5dcabadddbfbd6bfa.tar.gz";
@@ -9,6 +13,7 @@
   hp = pkgs.haskell.packages.ghc928.override {
     overrides = self: super: rec {
       cuckoo = markUnbroken (dontCheck super.cuckoo);
+      zlib = super.zlib.override {zlib = pkgs.zlib.overrideAttrs (_: {src = cloudflareZlib;});};
     };
   };
 in
diff --git a/flake.lock b/flake.lock
index 8fb24ce..4219465 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,5 +1,21 @@
 {
   "nodes": {
+    "cloudflareZlib": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1682701953,
+        "narHash": "sha256-KNS1FDznR2UaXo0WBOUh4lnVY23Kc9JnNyVtYzSpWDw=",
+        "owner": "cloudflare",
+        "repo": "zlib",
+        "rev": "d20bdfcd0efbdd72cb9d857e098ceac1bad41432",
+        "type": "github"
+      },
+      "original": {
+        "owner": "cloudflare",
+        "repo": "zlib",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1690875999,
@@ -17,6 +33,7 @@
     },
     "root": {
       "inputs": {
+        "cloudflareZlib": "cloudflareZlib",
         "nixpkgs": "nixpkgs"
       }
     }
diff --git a/flake.nix b/flake.nix
index cb7b97c..0d5bcb5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,13 +1,25 @@
 {
   inputs.nixpkgs.url = "github:nixos/nixpkgs";
+  inputs.cloudflareZlib = {
+    url = "github:cloudflare/zlib";
+    flake = false;
+  };
   outputs = {
     self,
     nixpkgs,
+    cloudflareZlib,
   }: let
     system = "x86_64-linux";
-    pkgs = import nixpkgs {inherit system;};
+    pkgs = import nixpkgs {
+      inherit system;
+      overlays = [
+        (_: super:
+          with super; {
+          })
+      ];
+    };
   in {
-    packages.${system}.default = import ./. {inherit pkgs;};
+    packages.${system}.default = import ./. {inherit pkgs cloudflareZlib;};
     devShells.${system}.default = self.packages.${system}.default.env;
   };
 }
-- 
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