Try to move the package into a src file

Makefile

@@ -7,6 +7,7 @@ run: setup
 	( \
 	find . -name __pycache__ -o -name "*.pyc" -delete; \
 	sudo iptables -I INPUT -p tcp --dport 8000 -j ACCEPT; \
+	cd src/
 	python manage.py runserver 0.0.0.0:8000; \
 	)
 
@@ -14,6 +15,7 @@ run: setup
 setup:
 	( \
 	docker-compose -f docker-compose-development.yml up -d; \
+	cd src/
 	if [ -f .second_run ]; then \
 		sleep 2; \
 		python manage.py collectstatic --noinput; \

flake.nix

@@ -16,9 +16,13 @@
         (final: prev: {
           inventoryEnv = prev.poetry2nix.mkPoetryEnv {
             projectDir = ./.;
+            editablePackageSources = {
+              inventory = ./src;
+            };
           };
           inventoryPackage = prev.poetry2nix.mkPoetryApplication {
             projectDir = ./.;
+            src = ./src;
           };
         })
       ];