$ ./pre-inst-env guix build --target=i686-w64-mingw32 readline
;;; note: source file /home/janneke/src/mingw-guix/gnu/packages/base.scm
;;;       newer than compiled /home/janneke/src/mingw-guix/gnu/packages/base.go
;;; note: source file /home/janneke/src/mingw-guix/gnu/packages/guile.scm
;;;       newer than compiled /home/janneke/src/mingw-guix/gnu/packages/guile.go
;;; note: source file /home/janneke/src/mingw-guix/gnu/packages/cross-base.scm
;;;       newer than compiled /home/janneke/src/mingw-guix/gnu/packages/cross-base.go
substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
substitute: updating list of substitutes from 'https://hydra.gnu.org'... 100.0%
substitute: updating list of substitutes from 'https://mirror.hydra.gnu.org'... 100.0%
substitute: updating list of substitutes from 'https://hydra.gnu.org'... 100.0%
@ build-started /gnu/store/m6gq2xz5kd3vn4zm1i0i6j0immlgyhmg-make-boot0-4.1.drv - x86_64-linux /var/log/guix/drvs/m6//gq2xz5kd3vn4zm1i0i6j0immlgyhmg-make-boot0-4.1.drv.bz2
starting phase `set-SOURCE-DATE-EPOCH'
phase `set-SOURCE-DATE-EPOCH' succeeded after 0.0 seconds
starting phase `set-paths'
environment variable `PATH' set to `/gnu/store/mv59pzrvf9fy5sihqwf9l8y9zaybxsxc-gcc-cross-x86_64-linux-4.9.3/bin:/gnu/store/gzsnvlggxpn09cq4zskin5x7y4xfphg6-binutils-cross-x86_64-linux-2.25.1/bin'
environment variable `CROSS_C_INCLUDE_PATH' set to `/gnu/store/hkwl20n5ca87bczjrlv8b8vfm26vcrxy-glibc-bootstrap-0/include:/gnu/store/clxwrx7hn1x33m7584yqz9mgd7d0z4i6-gcc-bootstrap-0/include:/gnu/store/h3ybmgxqpa05jcs4bk3hrxpp6ahhc3vg-glibc-cross-x86_64-linux-2.22/include:/gnu/store/cxrc97sbvggc4a5chyqrwkyw9vxg4ach-linux-libre-headers-cross-x86_64-linux-3.14.37/include'
environment variable `CROSS_CPLUS_INCLUDE_PATH' set to `/gnu/store/hkwl20n5ca87bczjrlv8b8vfm26vcrxy-glibc-bootstrap-0/include:/gnu/store/clxwrx7hn1x33m7584yqz9mgd7d0z4i6-gcc-bootstrap-0/include:/gnu/store/h3ybmgxqpa05jcs4bk3hrxpp6ahhc3vg-glibc-cross-x86_64-linux-2.22/include:/gnu/store/cxrc97sbvggc4a5chyqrwkyw9vxg4ach-linux-libre-headers-cross-x86_64-linux-3.14.37/include'
environment variable `CROSS_OBJC_INCLUDE_PATH' set to `/gnu/store/hkwl20n5ca87bczjrlv8b8vfm26vcrxy-glibc-bootstrap-0/include:/gnu/store/clxwrx7hn1x33m7584yqz9mgd7d0z4i6-gcc-bootstrap-0/include:/gnu/store/h3ybmgxqpa05jcs4bk3hrxpp6ahhc3vg-glibc-cross-x86_64-linux-2.22/include:/gnu/store/cxrc97sbvggc4a5chyqrwkyw9vxg4ach-linux-libre-headers-cross-x86_64-linux-3.14.37/include'
environment variable `CROSS_OBJCPLUS_INCLUDE_PATH' set to `/gnu/store/hkwl20n5ca87bczjrlv8b8vfm26vcrxy-glibc-bootstrap-0/include:/gnu/store/clxwrx7hn1x33m7584yqz9mgd7d0z4i6-gcc-bootstrap-0/include:/gnu/store/h3ybmgxqpa05jcs4bk3hrxpp6ahhc3vg-glibc-cross-x86_64-linux-2.22/include:/gnu/store/cxrc97sbvggc4a5chyqrwkyw9vxg4ach-linux-libre-headers-cross-x86_64-linux-3.14.37/include'
environment variable `CROSS_LIBRARY_PATH' set to `/gnu/store/hkwl20n5ca87bczjrlv8b8vfm26vcrxy-glibc-bootstrap-0/lib:/gnu/store/clxwrx7hn1x33m7584yqz9mgd7d0z4i6-gcc-bootstrap-0/lib:/gnu/store/h3ybmgxqpa05jcs4bk3hrxpp6ahhc3vg-glibc-cross-x86_64-linux-2.22/lib'
environment variable `GUIX_LOCPATH' unset
environment variable `CPATH' set to `/gnu/store/mv59pzrvf9fy5sihqwf9l8y9zaybxsxc-gcc-cross-x86_64-linux-4.9.3/include'
environment variable `LIBRARY_PATH' set to `/gnu/store/mv59pzrvf9fy5sihqwf9l8y9zaybxsxc-gcc-cross-x86_64-linux-4.9.3/lib'
phase `set-paths' succeeded after 0.0 seconds
starting phase `install-locale'
warning: failed to install 'en_US.utf8' locale: Invalid argument
phase `install-locale' succeeded after 0.0 seconds
starting phase `unpack'
In execvp of tar: No such file or directory
phase `unpack' failed after 0.0 seconds
builder for `/gnu/store/m6gq2xz5kd3vn4zm1i0i6j0immlgyhmg-make-boot0-4.1.drv' failed with exit code 1
@ build-failed /gnu/store/m6gq2xz5kd3vn4zm1i0i6j0immlgyhmg-make-boot0-4.1.drv - 1 builder for `/gnu/store/m6gq2xz5kd3vn4zm1i0i6j0immlgyhmg-make-boot0-4.1.drv' failed with exit code 1
cannot build derivation `/gnu/store/1fjnm2x2az4z4qaz3bad5p5zbygf5wqs-gcc-cross-boot0-4.9.3.drv': 1 dependencies couldn't be built
guix build: error: build failed: build of `/gnu/store/1fjnm2x2az4z4qaz3bad5p5zbygf5wqs-gcc-cross-boot0-4.9.3.drv' failed