Hello!

Meanwhile, I have updated core-updates-next to include

    d9ed0a463 bootstrap: Update %bootstrap-tarballs.
    4fd4efc81 bootstrap: Replace %mescc-tools-seed with %bootstrap-mescc-tools.
    562c37c7b bootstrap: Update %bootstrap-mes.
    b00a95be2 bootstrap: Add %bootstrap-mescc-tools.

With these, I can build

   ./pre-inst-env guix build hello
   ./pre-inst-env guix build --system=i686-linux hello
   ./pre-inst-env guix build --system=i686-linux bootstrap-tarballs

If these reproduce, we're getting real close.  However...

On my core-updates-next at gitlab I also have (see attached)

    5c2209ad4 bootstrap: Force i686-linux for bootstrap-tarballs.

which tries to support

   ./pre-inst-env guix build bootstrap-tarballs

which fails when attempting to build gcc-cross-sans-libc-i686-unknown-linux-gnu-5.5.0

    /tmp/guix-build-gcc-cross-sans-libc-i686-unknown-linux-gnu-5.5.0.drv-0/build/./gcc/cc1: error while loading shared libraries: libisl.so.15: cannot open shared object file: No such file or directory

I do not understand the dependency chain of why exactly this is being
rebuilt and what %current-system is, or why it fails.

janneke