Refactor the checks

flake.nix

@@ -41,7 +41,8 @@
             export DJANGO_SETTINGS_MODULE=network_inventory.settings.local
           '';
         };
-        checks.lint = pkgs.stdenv.mkDerivation {
+        checks = {
+          lint = pkgs.stdenv.mkDerivation {
             dontPatch = true;
             dontConfigure = true;
             dontBuild = true;
@@ -52,10 +53,10 @@
             checkInputs = [ pkgs.inventoryEnv ];
             checkPhase = ''
               mkdir -p $out
-            flake8 . --count --show-source --statistics | tee $out/test.log
+              flake8 . --count --show-source --statistics
             '';
           };
-        checks.tests = pkgs.stdenv.mkDerivation {
+          tests = pkgs.stdenv.mkDerivation {
             dontPatch = true;
             dontConfigure = true;
             dontBuild = true;
@@ -70,11 +71,10 @@
                      -nauto \
                      --nomigrations \
                      --cov=./src \
-                    --cov-report=html \
                      ./src
-            cp -r htmlcov $out/
             '';
           };
+        };
         packages.venv = pkgs.inventoryEnv;
         packages.inventory = pkgs.inventoryPackage;
         packages.default = pkgs.inventoryPackage;