[Nix-dev] Why can't Nix find my C++ compiler? (Mac OS X)

[Rico Huijbers]

Hi,

I'm new to Nix, and kicking the tires.

Right now, I'm trying to compile dmd (the D compiler) using Nix, but when I
try to compile it, it can't seem to find my C++ compiler:

    rix0rrr at moloch ~/D/n/nixpkgs(master)> nix-env -i dmd
    installing `dmd-2.066.1'
    these derivations will be built:
    /nix/store/wnpzsw0gjchi891kr60cvaq2r9z6bzq6-dmd-2.066.1.drv
    .
    .
    .
    building idgen
    g++ -m64 idgen.c -o idgenn
    make: g++: Command not found
    .
    .
    .
    error: build of
`/nix/store/wnpzsw0gjchi891kr60cvaq2r9z6bzq6-dmd-2.066.1.drv' failed

Running a build shell works fine:

    rix0rrr at moloch ~/D/n/nixpkgs(master)> nix-build '<nixpkgs>' --run-env
-A dmd

    [nix-shell:~/Dev/nix/nixpkgs]$ which gcc
    /usr/bin/gcc

But I notice that my regular PATH is still in effect (including /usr/bin),
and I figure it won't be in a "pure" Nix build, so I guess that kinda makes
sense.

Question is, why won't the dmd expression pick up the compiler normally?
The thing is using regular stdenv, and I guess it must have worked for
somebody, sometime.

I'm still on Mavericks, by the way.

Thanks for any help.

Regards,
Rico
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