Installing manually built software in Guix

[Mark H Weaver <mhw@netris.org>]

Hello all,

As a Guile developer, I'm in the habit of building Guile from git, and
occasionally installing that version with --prefix=/usr.

As a Guix enthusiast, I've recently been experimenting with building
Guile from git, with my environment variables set to attempt to use only
things from Guix:

--8<---------------cut here---------------start------------->8---
export PATH=$HOME/.guix-profile/bin
export LIBRARY_PATH=$HOME/.guix-profile/lib
export CPATH=$HOME/.guix-profile/include
export MANPATH=$HOME/.guix-profile/share/man:$HOME/.guix-profile/man
export PKG_CONFIG_PATH=$HOME/.guix-profile/lib/pkgconfig
export PYTHONPATH=$HOME/.guix-profile/lib/python2.7/site-packages
export XDG_DATA_DIRS=$HOME/.guix-profile/share
export PERL5LIB=$HOME/.guix-profile/lib/perl5/site_perl
export ACLOCAL_PATH=$HOME/.guix-profile/share/aclocal
--8<---------------cut here---------------end--------------->8---

I just tried "make install", as root, with these same environment
variable settings (but with HOME=/home/mhw).  It failed in the middle.
Here's the tail of the log:

--8<---------------cut here---------------start------------->8---
make[2]: Entering directory `/home/mhw/guile/guile-readline'
make  install-am
make[3]: Entering directory `/home/mhw/guile/guile-readline'
make[4]: Entering directory `/home/mhw/guile/guile-readline'
 /home/mhw/.guix-profile/bin/mkdir -p '/usr/lib'
 /bin/bash ../libtool   --mode=install /home/mhw/.guix-profile/bin/install -c   libguilereadline-v-18.la '/usr/lib'
libtool: install: warning: relinking `libguilereadline-v-18.la'
libtool: install: (cd /home/mhw/guile/guile-readline; /bin/bash /home/mhw/guile/libtool  --silent --tag CC --mode=relink gcc -Wall -Wmissing-prototypes -Wdeclaration-after-statement -Wpointer-arith -Wswitch-enum -fno-strict-aliasing -I/nix/store/a9j9bl7m73rhlal9z83z3wbl9m17di4i-libgc-7.4.0/include -g -O2 -version-info 18:0:0 -export-dynamic -no-undefined -o libguilereadline-v-18.la -rpath /usr/lib readline.lo -lreadline -lncurses ../libguile/libguile-2.0.la ../lib/libgnu.la -lcrypt -lm )
libtool: relink: warning: `/home/mhw/.guix-profile/lib/libunistring.la' seems to be moved
libtool: relink: warning: `/home/mhw/.guix-profile/lib/libgmp.la' seems to be moved
libtool: relink: warning: `/home/mhw/.guix-profile/lib/libltdl.la' seems to be moved
/usr/lib/libgc.so: could not read symbols: File in wrong format
collect2: error: ld returned 1 exit status
libtool: install: error: relink `libguilereadline-v-18.la' with the above command before installing it
make[4]: *** [install-libLTLIBRARIES] Error 1
make[4]: Leaving directory `/home/mhw/guile/guile-readline'
make[3]: *** [install-am] Error 2
make[3]: Leaving directory `/home/mhw/guile/guile-readline'
make[2]: *** [install] Error 2
make[2]: Leaving directory `/home/mhw/guile/guile-readline'
make[1]: *** [install-recursive] Error 1
make[1]: Leaving directory `/home/mhw/guile'
make: *** [install] Error 2
--8<---------------cut here---------------end--------------->8---

What went wrong here?  Is there a reasonable way to do this?

    Thanks,
      Mark