packages using Kino.JS built using deps_nix fail with a permissions error

[codyps]

Hi, I have a project I'm trying to use deps_nix to build. I've run into a case where kino_db, kino_slack, kino_vega_lite attempt to create a directory via expanding Kino.JS.__before_compile/1 and get a permissions denied error:

kino_db, on macos:

 nix log /nix/store/bl2snsz17c5b1dp18qkmjz90m5gnsimi-kino_db-0.3.0.drv | 
cat
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/9x5nkyaiaaas3ghc5iajx006ri89qc25-kino_db-0.3.0
source root is kino_db-0.3.0
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
Compiling 4 files (.ex)

== Compilation error in file lib/kino_db/sql_cell.ex ==
** (File.Error) could not make directory (with -p) "/private/tmp/nix-build-kino_db-0.3.0.drv-0/kino_db-0.3.0/_build/prod/lib/kino/priv/assets/KinoDB_SQLCell": permission denied
    (elixir 1.18.4) lib/file.ex:346: File.mkdir_p!/1
    (kino 0.14.2) expanding macro: Kino.JS.__before_compile__/1
    lib/kino_db/sql_cell.ex:1: KinoDB.SQLCell (module)

kino_vega_lite, on linux:

 nix log /nix/store/ci2kn2lwsknhm85g2z794nh3562jcccg-kino_vega_lite-0.1.13.drv | cat
Running phase: unpackPhase
@nix { "action": "setPhase", "phase": "unpackPhase" }
unpacking source archive /nix/store/85fn43fmps0qy08crq453v1hry1blrjl-kino_vega_lite-0.1.13
source root is kino_vega_lite-0.1.13
Running phase: patchPhase
@nix { "action": "setPhase", "phase": "patchPhase" }
Running phase: updateAutotoolsGnuConfigScriptsPhase
@nix { "action": "setPhase", "phase": "updateAutotoolsGnuConfigScriptsPhase" }
Running phase: configurePhase
@nix { "action": "setPhase", "phase": "configurePhase" }
Running phase: buildPhase
@nix { "action": "setPhase", "phase": "buildPhase" }
Compiling 4 files (.ex)

== Compilation error in file lib/kino/vega_lite.ex ==
** (File.Error) could not make directory (with -p) "/build/kino_vega_lite-0.1.13/_build/prod/lib/kino/priv/assets/Kino_VegaLite": permission denied
    (elixir 1.18.4) lib/file.ex:346: File.mkdir_p!/1
    (kino 0.14.2) expanding macro: Kino.JS.__before_compile__/1
    lib/kino/vega_lite.ex:1: Kino.VegaLite (module)

It appears the permissions issue here is that it's trying to write into a shared asserts directory under the kino dependency from within the kino_vega_lite (or other Kino.JS using) dependency. The directory _build/prod/lib/kino is actually symlinks to the nix store though (built when we build the kino package itself), so kino_vega_lite's build can't write to them and thus gets the permissions error.

I'm not 100% sure what Kino.JS intends to happen here, or it's architecture, but I'm curious if other folks have ideas about how I might workaround this issue.

Perhaps changing Kino.JS to use another directory in some way might work? Thanks.

Edit: for now I've dropped these dependencies, but I'd be interested in what tricks folks know of that might get them working with deps_nix.