diff --git a/flupdt/cli.py b/flupdt/cli.py
index dbf9f92..80c3362 100644
--- a/flupdt/cli.py
+++ b/flupdt/cli.py
@@ -4,11 +4,7 @@ import argparse
 
 def parse_inputs():
     parser = argparse.ArgumentParser()
-    parser.add_argument(
-        "flake_path", metavar="flake-path", help="path to flake to evaluate"
-    )
-    parser.add_argument(
-        "--keep-hydra", action="store_true", help="allow evaluating Hydra jobs"
-    )
+    parser.add_argument("flake_path", metavar="flake-path", help="path to flake to evaluate")
+    parser.add_argument("--keep-hydra", action="store_true", help="allow evaluating Hydra jobs")
     args = parser.parse_args()
     return args
diff --git a/flupdt/flake_show.py b/flupdt/flake_show.py
index b9113ce..e77dd97 100644
--- a/flupdt/flake_show.py
+++ b/flupdt/flake_show.py
@@ -33,9 +33,7 @@ def traverse_json(json_dict: dict) -> list[str]:
 
 
 def get_derivations_from_check(nix_path: str, path_to_flake: str) -> list[str]:
-    flake_check = bash_wrapper(
-        f"{nix_path} flake check --verbose --keep-going", path=path_to_flake
-    )
+    flake_check = bash_wrapper(f"{nix_path} flake check --verbose --keep-going", path=path_to_flake)
     if flake_check[2] != 0:
         logging.warn(
             "nix flake check returned non-zero exit code, collecting all available outputs"
@@ -57,9 +55,7 @@ def get_derivations(path_to_flake: str) -> list[str]:
     nix_path = shutil.which("nix")
     derivations = []
     if nix_path is None:
-        raise RuntimeError(
-            "nix is not available in the PATH, please verify that it is installed"
-        )
+        raise RuntimeError("nix is not available in the PATH, please verify that it is installed")
     flake_show = bash_wrapper(f"{nix_path} flake show --json", path=path_to_flake)
     if flake_show[2] != 0:
         logging.error("flake show returned non-zero exit code")
diff --git a/flupdt/main.py b/flupdt/main.py
index ecd6217..95d8bb2 100644
--- a/flupdt/main.py
+++ b/flupdt/main.py
@@ -10,19 +10,21 @@ import rad_development_python as rd
 def main():
     rd.configure_logger("INFO")
     args = parse_inputs()
-    print("hi")
     flake_path = args.flake_path
-    derivations = get_derivations(flake_path)
-    if (
-        not args.keep_hydra
-        and len(list(filter(lambda s: s.startswith("hydraJobs"), derivations))) > 0
-    ):
-        logging.info("--keep-hydra flag is not specified, removing Hydra jobs")
-        derivations = filter(lambda s: not s.startswith("hydraJobs"), derivations)
+    derivations, hydraJobs = rd.partition(
+        lambda s: s.startswith("hydraJobs"), get_derivations(flake_path)
+    )
     logging.info(f"derivations: {list(derivations)}")
     for d in derivations:
         evaluate_output(flake_path, d)
 
+    if not args.keep_hydra:
+        logging.info("--keep-hydra flag is not specified, removing Hydra jobs")
+    else:
+        logging.info(f"hydraJobs: {list(hydraJobs)}")
+        for d in hydraJobs:
+            evaluate_output(flake_path, d)
+
 
 if __name__ == "__main__":
     main()
diff --git a/pyproject.toml b/pyproject.toml
index 9d93ebd..ee22431 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -23,6 +23,39 @@ flake-update-diff = "flupdt.main:main"
 [tool.poetry.group.dev.dependencies]
 ruff = "0.5.5"
 
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
+
+[tool.ruff]
+
+line-length = 100
+indent-width = 4
+
+target-version = "py39"
+
+[tool.ruff.lint]
+select = ["ALL"]
+ignore = [
+    "ANN101", # (perm) this rule is deprecated
+    "ANN102", # (perm) this rule is deprecated
+    "G004",   # (perm) this is a performance nit
+]
+
+[tool.ruff.lint.per-file-ignores]
+
+"tests/**" = [
+    "S101", # (perm) pytest needs asserts
+]
+
+fixable = ["ALL"]
+
+[tool.ruff.lint.pydocstyle]
+convention = "google"
+
+[tool.ruff.lint.pycodestyle]
+max-line-length = 120
+
+[tool.ruff.lint.pylint]
+max-args = 9