Cannot build simple system configuration in developer shell inside Docker container

[lunik1]

Describe the bug

When using a nix develop shell inside the nixos/nix container, a simple system configuration fails to build.

Steps To Reproduce

A MWE can be found in this gist.

1. Clone the flake in the above gist
2. Mount the flake in the nixos/nix container with podman run -it --volume ${PWD}:/flake nixos/nix
3. cd /flake
4. Start developer shell with nix --extra-experimental-features 'nix-command flakes' develop
5. Attempt to build the test NixOS configuration with nix --extra-experimental-features 'nix-command flakes' build ".#nixosConfigurations.test.config.system.build.toplevel"
6. Build fails with:

error: builder for '/nix/store/32d1zpwmnfhkbsklrri9f4c8nsmdb0qz-append-initrd-secrets.drv' failed with exit code 1;
       last 2 log lines:
       > unpacking sources
       > variable $src or $srcs should point to the source
       For full logs, run 'nix log /nix/store/32d1zpwmnfhkbsklrri9f4c8nsmdb0qz-append-initrd-secrets.drv'.
error: 1 dependencies of derivation '/nix/store/0yqg3kg13zd0xch2gzipchbw75sagxnz-nixos-system-nixos-22.11.20220708.b39924f.drv' failed to build

nix --extra-experimental-features nix-command log /nix/store/32d1zpwmnfhkbsklrri9f4c8nsmdb0qz-append-initrd-secrets.drv:

@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking sources
variable $src or $srcs should point to the source

Expected behavior

The system configuration should build.

nix-env --version output
Inside developer shell:

nix-env (Nix) 2.9.2

Additional context

I have not been able to recreate this outside of a docker container. The build also succeeds when run outside a developer shell, and if done so subsequent builds inside the developer shell will succeed as the paths are reused from the nix store.

Image digest: sha256:c79d2fa0092680d2337c461bde48b2e2d6610872c0c7b0a903d3d75dfcbe83df

[chasecaleb]

I have no idea what's going on here, but I have this exact same problem in the same scenario (i.e. only occurs when running a dev shell inside a docker image). I've reproduced with the current nixos/nix:latest Docker image, which resolves to nixos/nix@sha256:fc55b9bf9f61742a3fc262c0dc9ad62ea8ace014bb5bd4b11341da879e7b26ce and nixos/nix:master, which resolves to nixos/nix@sha256:623a95ea73bded2225c521f4a33159259a5e7ed939de1934cab37c093d2242e3

[chasecaleb]

P.S. @lunik1 did you ever figure out a workaround?

[lunik1]

No, sorry