diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..e25bd2f
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,85 @@
+{
+  "nodes": {
+    "flake-parts": {
+      "inputs": {
+        "nixpkgs-lib": "nixpkgs-lib"
+      },
+      "locked": {
+        "lastModified": 1706830856,
+        "narHash": "sha256-a0NYyp+h9hlb7ddVz4LUn1vT/PLwqfrWYcHMvFB1xYg=",
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "rev": "b253292d9c0a5ead9bc98c4e9a26c6312e27d69f",
+        "type": "github"
+      },
+      "original": {
+        "owner": "hercules-ci",
+        "repo": "flake-parts",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1707956935,
+        "narHash": "sha256-ZL2TrjVsiFNKOYwYQozpbvQSwvtV/3Me7Zwhmdsfyu4=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "a4d4fe8c5002202493e87ec8dbc91335ff55552c",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs-lib": {
+      "locked": {
+        "dir": "lib",
+        "lastModified": 1706550542,
+        "narHash": "sha256-UcsnCG6wx++23yeER4Hg18CXWbgNpqNXcHIo5/1Y+hc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "97b17f32362e475016f942bbdfda4a4a72a8a652",
+        "type": "github"
+      },
+      "original": {
+        "dir": "lib",
+        "owner": "NixOS",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-parts": "flake-parts",
+        "nixpkgs": "nixpkgs",
+        "treefmt-nix": "treefmt-nix"
+      }
+    },
+    "treefmt-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1707300477,
+        "narHash": "sha256-qQF0fEkHlnxHcrKIMRzOETnRBksUK048MXkX0SOmxvA=",
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "rev": "ac599dab59a66304eb511af07b3883114f061b9d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "treefmt-nix",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..a984da8
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,54 @@
+{
+  description = "Wings";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    treefmt-nix = {
+      url = "github:numtide/treefmt-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+  };
+
+  outputs = {...} @ inputs:
+    inputs.flake-parts.lib.mkFlake {inherit inputs;} {
+      systems = ["aarch64-darwin" "aarch64-linux" "x86_64-darwin" "x86_64-linux"];
+
+      imports = [
+        inputs.treefmt-nix.flakeModule
+      ];
+
+      perSystem = {system, ...}: let
+        pkgs = import inputs.nixpkgs {inherit system;};
+      in {
+         devShells.default = pkgs.mkShell {
+          buildInputs = with pkgs; [
+            go_1_22
+            gofumpt
+            golangci-lint
+            gotools 
+          ];
+        };
+
+        treefmt = {
+          projectRootFile = "flake.nix";
+
+          programs = {
+            alejandra.enable = true;
+            deadnix.enable = true;
+            gofumpt = {
+              enable = true;
+              extra = true;
+            };
+            shellcheck.enable = true;
+            shfmt = {
+              enable = true;
+              indent_size = 0; # 0 causes shfmt to use tabs
+            };
+            yamlfmt.enable = true;
+          };
+        };
+      };
+    };
+}
diff --git a/server/filesystem/archive.go b/server/filesystem/archive.go
index d7d6446..dae5cc6 100644
--- a/server/filesystem/archive.go
+++ b/server/filesystem/archive.go
@@ -157,7 +157,7 @@ func (a *Archive) Stream(ctx context.Context, w io.Writer) error {
 		i := ignore.CompileIgnoreLines(strings.Split(a.Ignore, "\n")...)
 		callback = a.callback(func(_ int, _, relative string, _ ufs.DirEntry) error {
 			if i.MatchesPath(relative) {
-				return ufs.SkipDir
+				return SkipThis
 			}
 			return nil
 		})