diff --git a/.envrc b/.envrc
index a988035..8dfc6aa 100644
--- a/.envrc
+++ b/.envrc
@@ -1,2 +1 @@
-nix_direnv_watch_file requirements.txt
 use flake || use nix
diff --git a/flake.nix b/flake.nix
index 5626d3d..6960887 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,25 +15,27 @@
         lib = pkgs.lib;
         python3Packages = pkgs.python3Packages;
         fetchPypi = pkgs.fetchPypi;
+
+          src = pkgs.fetchFromGitHub {
+            owner = "webcomics";
+            repo = "dosage";
+            rev = "9163317abadcef0a562afaaf422828b56d006e20";
+            hash = "sha256-t5HxvXCFPNG5K1uDtfIxDo6JV921ywY1Eznj7GoSh44=";
+          };
       in rec {
         defaultPackage = python3Packages.buildPythonApplication rec {
           pname = "dosage";
           version = "3.1.dev104+g9e05fae304";
           format = "pyproject";
 
-          src = pkgs.fetchFromGitHub {
-            owner = "webcomics";
-            repo = "dosage";
-            rev = "9e05fae3041f0b20260d253b9964aed53fb3932e";
-            hash = "sha256-91lVAc6Mkeot3T12MAl7v9v4huMWD+0O18b3Hjd4Bkw=";
-          };
-
           nativeCheckInputs = with python3Packages; [
             pytestCheckHook
             pytest-xdist
             responses
           ];
 
+          requirements = "${src}/setup/requirements.txt";
+
           nativeBuildInputs = with python3Packages; [ setuptools-scm ];
 
           propagatedBuildInputs = with python3Packages; [