Debugging a "Is a directory (os error 21)" error

[kastl-ars]

Hi all,

I am just starting with deno, so please forgive me if this is in a FAQ or similar that I might have missed.

I am trying to compile pkgx but always end up with the same error, not matter which --output parameter I use (or omit).

I am using the following command taken from pkgx's configuration file:

deno compile \
    --lock=deno.lock \
    --allow-read \
    --allow-write \
    --allow-run \
    --allow-env \
    --allow-ffi \
    --unstable-kv \
    --unstable-cron \
    --output XXX/pkgx
    ./entrypoint.ts

I tried using a directory I created before instead of XXX, I tried using $(mktemp -d), I tried giving only the directory (no file name), I tried omitting the output directory.

I always get the same error (with different paths for the resulting file):

Compile file:///pkgx/entrypoint.ts to bin/pkgx
error: Writing temporary file 'bin/pkgx.tmp-960d8c20d146d532'

Caused by:
    Is a directory (os error 21)

The user I am running this command as has permissions to create files in the directory I specify.

So I am a little puzzled and would like to debug this further. How to do that? I found no --verbose or debug flags for the deno or deno compile commands.

Kind Regards,
Johannes