feat(nix): add source filtering

this - along with garnix - should mostly eliminate unneeded (re)builds

Signed-off-by: seth <getchoo@tuta.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/flake.nix b/flake.nix
index a58d66fb..afb0ec63 100644
--- a/flake.nix
+++ b/flake.nix
@@ -4,6 +4,7 @@
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixpkgs-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
+    nix-filter.url = "github:numtide/nix-filter";
     pre-commit-hooks = {
       url = "github:cachix/pre-commit-hooks.nix";
       inputs.nixpkgs.follows = "nixpkgs";