Make guix use alternative substitute if one is down

kreyren@dreamon ~$ guix install gimp

The following package will be installed:

gimp 2.10.32

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 0.0%guix substitute: warning: ci.guix.gnu.org: connection failed: No route to host

substitute:

20,6 MB will be downloaded

substitute: updating substitutes from 'https://ci.guix.gnu.org'... 0.0%

guix substitute: error: connect*: No route to host

substitution of /gnu/store/c0wd1i6yknmiyp89626mfr9db74dayry-libmng-2.0.3 failed

guix install: error: some substitutes for the outputs of derivation `/gnu/store/pzd13q9y72402gvpmldj0pjq9frv8v1p-gimp-2.10.32.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source

kreyren@dreamon ~$ guix install --substitute-urls=https://bordeaux.guix.gnu.org gimp

The following package will be installed:

gimp 2.10.32

substitute: updating substitutes from 'https://bordeaux.guix.gnu.org'... 100.0%

20,6 MB will be downloaded

libmng-2.0.3 229KiB 1.6MiB/s 00:00 [##################] 100.0%

libmypaint-1.6.1 190KiB 2.0MiB/s 00:00 [##################] 100.0%

gimp-2.10.32 19.2MiB 4.8MiB/s 00:04 [##################] 100.0%

The following derivation will be built:

/gnu/store/xym56sbrcq1fz3j2vfxkirbfn7330rjg-profile.drv

applying 3 grafts for libheif-1.12.0 ...

applying 1 graft for libmypaint-1.6.1 ...

applying 20 grafts for gimp-2.10.32 ...

building CA certificate bundle...

listing Emacs sub-directories...

building fonts directory...

generating GdkPixbuf loaders cache...

generating GLib schema cache...

creating GTK+ icon theme cache...

building cache files for GTK+ input methods...

building directory of Info manuals...

building XDG desktop file cache...

building XDG MIME database...

building profile with 30 packages...

From:	Jacob Hrbek
Subject:	Make guix use alternative substitute if one is down
Date:	Wed, 21 Sep 2022 13:09:00 +0000