choosenim breaks nim when used with custom paths

[peppergrayxyz]

choosenim alters nim in a way that breaks it when used with custom paths:

$ choosenim --choosenimDir:$nimpath/my-choosenim --nimbleDir:$nimpath/my-nimbledir stable
$ export PATH=$nimpath/my-nimbledir/bin:$PATH
$ nim --version

Expected Behavior:

Nim Compiler Version 2.2.0 [Linux: amd64]
Compiled at 2024-10-02
Copyright (c) 2006-2024 by Andreas Rumpf

git hash: 78983f1876726a49c69d65629ab433ea1310ece1
active boot switches: -d:release

Actual Behavior:

     Error: getAppFilename failed. (Error was: Unable to read /home/user/.choosenim/current. (Error was: No installation has been chosen. (File missing: /home/user/.choosenim/current)))
      Info: If unexpected, please report this error to https://github.com/nim-lang/choosenim

Observations:

When building nim from source, this behavior is not present.

See also: nim-lang/Nim#24281 (comment)

The string If unexpected, please report this error doesn't even show up in nim source. Checking all repos, it only shows up in the source code of choosenim. For some resons this check ends up in the binaries (nim, nimble, etc.) when fetched via choosenim.

via choosenim

strings nim | grep unexpected
@If unexpected, please report this error to https://github.com/nim-lang/choosenim

built from source:

strings nim | grep unexpected
lowerings.nim(250, 3) `field != unexpected construct in the new-styled concept: cannot infer the value of the st static param '
 unexpectedly found, while the following intermediate section level(s) are mississing on lines 
@unexpected postprocess directive
@unexpected set type kind
@unexpected pragma
@unexpected indentation in quoted literal block
@unexpected de-indentation in Markdown code block

If this behavior is intended, there should be an env-var or something to set the path.