From 67b486044de3f1607c1c0e9385ae0cf00dbd041e Mon Sep 17 00:00:00 2001
From: Brian Hicks <brian@brianthicks.com>
Date: Tue, 20 Jul 2021 08:36:00 -0500
Subject: [PATCH] use niv

---
 nix/sources.json | 12 ++++++++++++
 shell.nix        |  5 +++++
 2 files changed, 17 insertions(+)

diff --git a/nix/sources.json b/nix/sources.json
index 7655c1bb5f..7f02e9546f 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -1,4 +1,16 @@
 {
+    "niv": {
+        "branch": "master",
+        "description": "Easy dependency management for Nix projects",
+        "homepage": "https://github.com/nmattia/niv",
+        "owner": "nmattia",
+        "repo": "niv",
+        "rev": "e0ca65c81a2d7a4d82a189f1e23a48d59ad42070",
+        "sha256": "1pq9nh1d8nn3xvbdny8fafzw87mj7gsmp6pxkdl65w2g18rmcmzx",
+        "type": "tarball",
+        "url": "https://github.com/nmattia/niv/archive/e0ca65c81a2d7a4d82a189f1e23a48d59ad42070.tar.gz",
+        "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
+    },
     "nixpkgs": {
         "branch": "nixpkgs-unstable",
         "description": "Nix Packages collection",
diff --git a/shell.nix b/shell.nix
index e06b0736b6..44666067d0 100644
--- a/shell.nix
+++ b/shell.nix
@@ -59,6 +59,11 @@ let
 
     # faster builds - see https://github.com/rtfeldman/roc/blob/trunk/BUILDING_FROM_SOURCE.md#use-lld-for-the-linker
     llvmPkgs.lld
+
+    # meta-tools
+    # note: niv manages its own nixpkgs so it doesn't need pkgs.callPackage. Do
+    # `cachix use niv` to get cached builds!
+    (import sources.niv { }).niv
   ];
 in pkgs.mkShell {
   buildInputs = inputs ++ darwinInputs ++ linuxInputs;