diff --git a/flake.nix b/flake.nix
index 5e3d75bf3d..92404ea21f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -83,6 +83,9 @@
           ];
 
           cargoLock.lockFile = ./Cargo.lock;
+          cargoLock.outputHashes = {
+            "git2-0.18.2" = "sha256-FpHp1zbHRYCINQ72Hrc+jTGE4wQnb6pib1QFQQahQwE=";
+          };
           nativeBuildInputs = with pkgs; [
             gzip
             installShellFiles