diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index fc6347a..0da1bf4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -13,6 +13,9 @@ jobs:
       - uses: actions/checkout@v3
       - uses: cachix/install-nix-action@v22
       - uses: DeterminateSystems/magic-nix-cache-action@main
-      - name: Test
-        run: |
-          nix flake check -L -j auto
+      - name: Setup dependencies
+        run: nix develop --command bash -c "pdm sync"
+      - name: Linting
+        run: nix develop --command bash -c "pdm run dev linting"
+      - name: Tests
+        run: nix develop --command bash -c "pdm run pytest --ds=network_inventory.settings.ram_test -nauto --nomigrations --cov=./src ./src"
diff --git a/dev.sh b/dev.sh
index 24cb812..b41f1b7 100755
--- a/dev.sh
+++ b/dev.sh
@@ -116,15 +116,26 @@ debug() {
 descriptions["debug"]="Run the tests and drop into the debugger on failure."
 tasks["debug"]=debug
 
+linting() {
+    pylint --rc-file pyproject.toml -j 0 -E ./src/
+    mypy ./src/
+}
+descriptions["linting"]="Run the linters agains the source code. Tests are excluded."
+tasks["linting"]=linting
+
 check() {
-    nix flake check
+    linting
+    test
 }
 descriptions["check"]="Run the linter and tests."
 tasks["check"]=check
 
 test() {
-    export DJANGO_SETTINGS_MODULE=network_inventory.settings.ram_test
-    pytest -nauto --nomigrations --cov-config="$PROJECT_DIR/.coveragerc" --cov-report=html "$PROJECT_DIR/src"
+    DJANGO_SETTINGS_MODULE=network_inventory.settings.ram_test \
+        pytest -nauto \
+        --nomigrations \
+        --cov-config="$PROJECT_DIR/.coveragerc" \
+        --cov-report=html "$PROJECT_DIR/src"
 }
 descriptions["test"]="Run the tests in the RAM DB and write a coverage report."
 tasks["test"]=test
diff --git a/flake.nix b/flake.nix
index cb91525..621761c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -44,42 +44,6 @@
             export DJANGO_SETTINGS_MODULE=network_inventory.settings.local
           '';
         };
-        checks = {
-          lint = pkgs.stdenv.mkDerivation {
-            dontPatch = true;
-            dontConfigure = true;
-            dontBuild = true;
-            dontInstall = true;
-            doCheck = true;
-            name = "lint";
-            src = ./.;
-            checkInputs = [ pkgs.pdm ];
-            checkPhase = ''
-              mkdir -p $out
-              pylint --rc-file pyproject.toml -j 0 -E src/
-              cd src/ && mypy --config-file=../pyproject.toml .
-            '';
-            DJANGO_SETTINGS_MODULE = "network_inventory.settings.ram_test";
-          };
-          tests = pkgs.stdenv.mkDerivation {
-            dontPatch = true;
-            dontConfigure = true;
-            dontBuild = true;
-            dontInstall = true;
-            doCheck = true;
-            name = "test";
-            src = ./.;
-            checkInputs = [ pkgs.pdm pkgs.postgresql_15 pkgs.overmind ];
-            checkPhase = ''
-              mkdir -p $out
-              pytest --ds=network_inventory.settings.ram_test \
-                      -nauto \
-                      --nomigrations \
-                      --cov=./src \
-                      ./src
-            '';
-          };
-        };
         packages = {
           container = pkgs.dockerTools.buildImage {
             name = "network-inventory";
@@ -96,32 +60,32 @@
                 (pkgs.writeShellScriptBin "start-inventory" ''
                   if [ -f .first_run ]; then
                       sleep 2
-                      ${pkgs.inventoryEnv}/bin/django-admin collectstatic --noinput
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations
-                      ${pkgs.inventoryEnv}/bin/django-admin migrate
+                      django-admin collectstatic --noinput
+                      django-admin makemigrations
+                      django-admin migrate
                   else
-                      ${pkgs.inventoryEnv}/bin/django-admin collectstatic --noinput
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations backups
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations computers
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations core
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations customers
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations devices
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations licenses
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations nets
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations softwares
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations users
-                      ${pkgs.inventoryEnv}/bin/django-admin makemigrations
-                      ${pkgs.inventoryEnv}/bin/django-admin migrate
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata backups
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata computers
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata core
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata devices
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata nets
-                      ${pkgs.inventoryEnv}/bin/django-admin loaddata softwares
-                      ${pkgs.inventoryEnv}/bin/django-admin shell -c "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('admin', 'admin@example.com', 'password')"
+                      django-admin collectstatic --noinput
+                      django-admin makemigrations backups
+                      django-admin makemigrations computers
+                      django-admin makemigrations core
+                      django-admin makemigrations customers
+                      django-admin makemigrations devices
+                      django-admin makemigrations licenses
+                      django-admin makemigrations nets
+                      django-admin makemigrations softwares
+                      django-admin makemigrations users
+                      django-admin makemigrations
+                      django-admin migrate
+                      django-admin loaddata backups
+                      django-admin loaddata computers
+                      django-admin loaddata core
+                      django-admin loaddata devices
+                      django-admin loaddata nets
+                      django-admin loaddata softwares
+                      django-admin shell -c "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('admin', 'admin@example.com', 'password')"
                       touch .first_run
                   fi
-                  ${pkgs.inventoryEnv}/bin/gunicorn network_inventory.wsgi:application --reload --bind 0.0.0.0:8000 --workers 3
+                  gunicorn network_inventory.wsgi:application --reload --bind 0.0.0.0:8000 --workers 3
                 '')
               ];
             };