buildFHSUserEnv is for software that we can't patch. This is not the case for vlang.

I wasn't aware there was another way to fix this.
How do I do it?

@Chiiruno Usually for open source software we apply patches and/or simple wrappers to make things work the "Nix way".

@veprbl I did attempt to use a wrapper instead, unfortunately it simply would not work.
I looked through the source and I didn't find any hard references to /bin, so I'm not entirely sure what the issue is.
Perhaps vlang/v#1509 is related?

@Chiiruno You need to document the issue better. What doesn't work? How does it not work?
I can't reproduce the issue as described:

Some examples weren't working.

Everything I've tried compiles for me as long as I use
nix-shell -p vlang -p glfw -p freetype -p openssl

Because it doesn't work without that.
Sorry, it's been a busy day.

To elaborate, -compress does not work without upx and binutils.
On it's own, vlang will not compile programs that require glfw, freetype, or openssl without the fhs env.
I'll test your command real quick.

Okay, it works with that command.
Is there a way to get this to work without having to use that command however?

In principle there is nothing wrong with the current situation. It makes a perfect sense that if you want to compile something that uses, for example, the glfw, then you need to include the glfw dependency in your environment.

If V only supports limited number of libraries, it should be possible to make them all work out of the box. Perhaps putting them to the propagatedBuildInputs should be enough for most cases.

Okay, I had a fundamental misunderstanding when testing apparently.
Before, I tried propagatedBuildInputs and it didn't work, however I was calling /nix/store/qm8p5085lqq2flivwqmmmhjbd7sxlpn6-vlang-0.1.21/bin/v, and that was dumb, since it wasn't using the shell of the derivation, but my current system.
I used propagatedBuildInputs with nix-shell -p /nix/store/qm8p5085lqq2flivwqmmmhjbd7sxlpn6-vlang-0.1.21 and it works fine now.
Will update with this much simpler method.

@GrahamcOfBorg build vlang