STANDARDS
       The  what  utility conforms to IEEE Std 1003.1-2001 (“POSIX.1”).  The -q
       option is a non-standard FreeBSD extension which may not be available on
       other operating systems.

HISTORY
       The what command appeared in 4.0BSD.

The what utility searches each specified file for sequences of the form “@(#)” as inserted by the SCCS source
code control system. It prints the remainder of the string following this marker, up to a NUL character,
newline, double quote, ‘>’ character, or backslash.

it seems trivial to write a program that does the same thing. potentially even a stub binary might work (does anything even use this marker syntax?)

oh yeah, it is actually used. wild

saiko@mulex-copan ~ % what -q /usr/bin/true
PROGRAM:true  PROJECT:shell_cmds-326
PROGRAM:true  PROJECT:shell_cmds-326

I'm havnig a bit of a strange issue. For some reason the wrong python binary gets executed despite not being in $PATH

~ $ whereis python                                                                                                                                                                                                                                                                                                                                                                                                                      
python:
~ $ nix-shell -p 'python3.withPackages( ps: [ ps.valkey ])' 
bash: warning: setlocale: LC_COLLATE: cannot change locale (): No such file or directory

[nix-shell:~]$ whereis python
python: /nix/store/jlq2n516adkdbf7fgf1bja9h8l4gxk7j-python3-3.13.9-env/bin/python /nix/store/jlq2n516adkdbf7fgf1bja9h8l4gxk7j-python3-3.13.9-env/share/man/man1/python.1.gz
bash: warning: setlocale: LC_COLLATE: cannot change locale (): No such file or directory

[nix-shell:~]$ python -c 'import valkey'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
    import valkey
ModuleNotFoundError: No module named 'valkey'
bash: warning: setlocale: LC_COLLATE: cannot change locale (): No such file or directory

[nix-shell:~]$ /nix/store/jlq2n516adkdbf7fgf1bja9h8l4gxk7j-python3-3.13.9-env/bin/python -c 'import valkey'
bash: warning: setlocale: LC_COLLATE: cannot change locale (): No such file or directory

[nix-shell:~]$ 

The python which runs when just typing python is just some pkgs.python3. nix why-depends says it's installed because of git.