[Nix-dev] /bin in chroot builds

[Eelco Dolstra]

Hi,

Lluís Batlle i Rossell wrote:

> I noticed the nixos nix.conf includes /bin in the build chroot.
> 
> I saw that perl, when using the system() command, it runs /bin/sh "on unix", the
> manual says.

Actually, the system() function in Glibc executes /bin/sh.  And there are
numerous shells scripts that refer to /bin/sh.  So this is an impure dependency
that's very hard to get rid of.

> In ubuntu, /bin/sh happens to point to /bin/dash, and so that is not able to
> parse a thing like "source $stdenv/setup".
> 
> The buildenv package consists of a perl builder calling:
>   system("eval \"\$postBuild\"")

Aha.  So this should be changed to `system("$ENV{SHELL} -c 'eval $postBuild'")'
or something like that.

-- 
Eelco Dolstra | http://www.st.ewi.tudelft.nl/~dolstra/