diff --git a/lint.nix b/lint.nix
deleted file mode 100644
index b4968a3..0000000
--- a/lint.nix
+++ /dev/null
@@ -1,24 +0,0 @@
-{ shellcheck
-, mypy
-, python3
-, lib
-, ruff
-, runCommand
-}:
-runCommand "lint" { } ''
-  set -e
-  mkdir source
-  cp -r ${./.}/* source
-  chmod +w source
-  cd source
-
-  echo run shellcheck
-  ${shellcheck}/bin/shellcheck direnvrc
-  echo run black
-  ${lib.getExe python3.pkgs.black} --check .
-  echo run ruff
-  ${lib.getExe ruff} tests
-  echo run mypy
-  ${lib.getExe mypy} tests
-  touch $out
-''
diff --git a/shell.nix b/shell.nix
index 19f9be5..87e4645 100644
--- a/shell.nix
+++ b/shell.nix
@@ -5,10 +5,7 @@ mkShell {
   nativeBuildInputs = [
     python3.pkgs.pytest
     python3.pkgs.mypy
-    python3.pkgs.black
-    python3.pkgs.flake8
     ruff
-    shellcheck
     direnv
   ];
 }