No 'processes' option defined: https://devenv.sh/processes/

[i-am-logger]

Describe the bug
using flake with multiple devenv as follow

      devShells = forEachSystem (
        system:
        let
          pkgs = inputs.nixpkgs.legacyPackages.${system};
        in
        {
          default = import ./devnv.nix {
            inherit inputs pkgs system;
          };
          api = import ./api/devenv.nix {
            inherit inputs pkgs system;
          };
          ui = import ./ui/devenv.nix {
            inherit inputs pkgs system;
          };
        }
      );

then running the following:

nix develop --no-pure-eval .#api -> this works and i get the `api` env

when I then try to

devenv up #api

I get the following error:

No 'processes' option defined: https://devenv.sh/processes/

which is weird as the ./api/devenv.nix has postgress service and cargo watch process

[sandydoo]

No 'processes' option defined: https://devenv.sh/processes/

That's a strange message for a flake project. One gotcha with the flake integration is that you need to add devenv-up packages to the flake for each shell. Example here: https://devenv.sh/guides/using-with-flakes/#multiple-shells

[i-am-logger]

yes, that is exactly what i have done.

      packages = forEachSystem (
        system:
        let
          pkgs = import nixpkgs { inherit system; };
          devenv-up = self.devShells.${system}.default.config.procfileScript;
          devenv-test = self.devShells.${system}.default.config.test;
          api = pkgs.callPackage ./api/package.nix { inherit pkgs naersk; };
          api-docker = pkgs.callPackage ./api/docker.nix { inherit pkgs api; };
        in
        {
          devenv-up = devenv-up;
          devenv-test = devenv-test;
          api = api;
          api-docker = api-docker;
        }
      );

[i-am-logger]

btw, I haven't looked yet on how devenv actually build docker images, but i built mine with nix:

pkgs.dockerTools.buildLayeredImage {
  name = api.pname;
  tag = "latest";
  created = "now";
  contents = [ api ];
  config = {
    Cmd = [
      ("/bin/" + api.pname)
    ];
  };
}```

[i-am-logger]

          api-devenv-up = self.devShells.${system}.api.config.procfileScript;
          api-devenv-test = self.devShells.${system}.api.config.test;

          ui-devenv-up = self.devShells.${system}.ui.config.procfileScript;
          ui-devenv-test = self.devShells.${system}.ui.config.test;

with devshells:

      devShells = forEachSystem (
        system:
        let
          pkgs = inputs.nixpkgs.legacyPackages.${system};
        in
        {
          default = import ./devenv.nix {
            inherit inputs pkgs system;
          };
          api = import ./api/devenv.nix {
            inherit inputs pkgs system;
          };
          ui = import ./ui/devenv.nix {
            inherit inputs pkgs system;
          };
        }
      );

running dev-env up #api

(masked dirs)

warning: Git tree '/..' is dirty
error: flake 'git+file:///....' does not provide attribute 'packages.x86_64-linux.devenv-up', 'legacyPackages.x86_64-linux.devenv-up' or 'devenv-up'

this shows that a default devenv-up is required ... though when i add default it never finds processes to run

[i-am-logger]

same goes with devenv test .#api