giux version 1.4.0 on linux

Hello,

I followed the instructions to install guix using the install script and ran these commands to fix a permissions error about mounting:

```
sudo semodule -i /gnu/store/*-guix-*/share/selinux/guix-daemon.cil
sudo restorecon -R /gnu /var/guix
sudo systemctl restart guix-daemon
```

During installation, I agreed to substitutes being enabled. However when I try to install packages using guix install I get errors:

```

build of /gnu/store/6w0c56ja6zj2253mrg0al0a5ab8l4s6w-bison-3.7.6.tar.xz.drv failed

View build log at '/var/log/guix/drvs/6w/0c56ja6zj2253mrg0al0a5ab8l4s6w-bison-3.7.6.tar.xz.drv.gz'.

building /gnu/store/97z4gi6qvqld54c9q5l6bkj33x997c0f-Python-3.5.9.tar.xz.drv...

cannot build derivation /gnu/store/87dw3k03f0wznkqjajny4rsydbvmixsp-bison-3.7.6.drv': 1 dependencies couldn't be built

cannot build derivation /gnu/store/9j7p82rlgy041cjmw1k1nh3pql2bhyyd-bison-3.7.6.drv': 1 dependencies couldn't be built

cannot build derivation /gnu/store/immd043b3w45gj9izkjddyj0ji8jn0f1-bison-boot0-3.7.6.drv': 1 dependencies couldn't be built

cannot build derivation /gnu/store/8w8m1m6sm09r85rwndcmams4ssfx63cj-glibc-locales-2.33.drv': 1 dependencies couldn't be built

guix install: error: build of /gnu/store/8w8m1m6sm09r85rwndcmams4ssfx63cj-glibc-locales-2.33.drv' failed

```

guix build bison --dry-run

hint: Consider installing the glibc-locales' package and defining GUIX_LOCPATH', along these

lines:

guix install glibc-locales

export GUIX_LOCPATH="$HOME/.guix-profile/lib/locale"

See the "Application Setup" section in the manual, for more info.

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 0.0%guix substitute: warning: ci.guix.gnu.org: host not found: Temporary failure in name resolution

substitute:

substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 0.0%guix substitute: warning: bordeaux.guix.gnu.org: host not found: Temporary failure in name resolution

substitute:

The following derivations would be built:

```

I checked the build logs:

```

zcat /var/log/guix/drvs/6w/0c56ja6zj2253mrg0al0a5ab8l4s6w-bison-3.7.6.tar.xz.drv.gz

Starting download of /gnu/store/ixb5iz7rpqcxs6s2143h5lp9wnjh2i2p-bison-3.7.6.tar.xz

From https://ftpmirror.gnu.org/gnu/bison/bison-3.7.6.tar.xz...