Some toolchains show execution errors despite looking similar to existing ones

In particular, this happened today with a toolchain forked by @sebastien.marcel at the platform. The same happened with another colleague.

If the user runs on the original fork, everything runs fine. If the user tries to use his version, the error shows up.

@sebastien.marcel: Could you please share with me user anjos, the said toolchain? I'll try to have a look on its contents and figure out the problem.