This used to be the case before commit 531e4b80c9 which seems to
have dropped it by accident.
Removes one unnecessary build of pkgconfig during stdenv bootstrapping.
This happened in VM builds:
make flags: SHELL=/nix/store/dbxpkswwc7rh6g1iy6dwqklzw39hihb1-bash-4.3-p33/bin/bash
/nix/store/jm26xg0h3jcrg4bbrwiqx3jpirscdk0p-stdenv/setup: line 658: 5957 Segmentation fault make ${makefile:+-f $makefile} ${enableParallelBuilding:+-j${NIX_BUILD_CORES} -l${NIX_BUILD_CORES}} $makeFlags "${makeFlagsArray[@]}" $buildFlags "${buildFlagsArray[@]}"
Shea Levy