Hello,

I tried several times to install ungoogled-chromium with "guix package
-i ungoogled-chromium", and guix always starts building it

checking the weather of that package gives me this result:

--8<---------------cut here---------------start------------->8---
giovanni@anemone: guix weather --manifest=.ungoogled-chromium.manifest
computing 1 package derivations for x86_64-linux...
looking for 1 store items on https://ci.guix.info...
https://ci.guix.info
  100.0% substitutes available (1 out of 1)
  99.3 MiB of nars (compressed)
  288.3 MiB on disk (uncompressed)
  0.004 seconds per request (0.0 seconds in total)
  274.9 requests per second
Backtrace:
          13 (primitive-load "/home/giovanni/.config/guix/current/bi…")
In guix/ui.scm:
  1654:12 12 (run-guix-command _ . _)
In ice-9/boot-9.scm:
    829:9 11 (catch _ _ #<procedure 7fb8c13409b8 at guix/ui.scm:624…> …)
    829:9 10 (catch _ _ #<procedure 7fb8c13409d0 at guix/ui.scm:750…> …)
In guix/scripts/weather.scm:
    496:8  9 (_)
In srfi/srfi-1.scm:
    640:9  8 (for-each #<procedure 324a480 at guix/scripts/weather.…> …)
In guix/scripts/weather.scm:
   497:20  7 (_ "https://ci.guix.info")
In ice-9/boot-9.scm:
    829:9  6 (catch srfi-34 #<procedure 23f25c0 at guix/scripts/wea…> …)
In guix/scripts/weather.scm:
   211:23  5 (_)
In guix/ci.scm:
    96:15  4 (queued-builds _ _)
    82:15  3 (json-fetch _)
In guix/http-client.scm:
    88:25  2 (http-fetch _ #:port _ #:text? _ #:buffered? _ # _ # _ # …)
In guix/build/download.scm:
    413:4  1 (open-connection-for-uri _ #:timeout _ # _)
    313:6  0 (tls-wrap #<closed: file 2ff4310> _ # _)

guix/build/download.scm:313:6: In procedure tls-wrap:
X.509 certificate of 'ci.guix.info' could not be verified:
  signer-not-found
  invalid
--8<---------------cut here---------------end--------------->8---

with this manifest file:

--8<---------------cut here---------------start------------->8---
(specifications->manifest
 '("ungoogled-chromium"))
--8<---------------cut here---------------end--------------->8---

so 100% substitutes are available, but I get an error on X.509
ci.guix.info certificate verification: is this the reason for guix
starts building instead of downloading the substitute?

also, at 27% of the build process it fails with this message:

--8<---------------cut here---------------start------------->8---
building /gnu/store/4mvzzx2jmr4r4p2kx0hcvwr9s9lvx0gd-ungoogled-chromium-72.0.3626.109.drv...
 27% [##################################################                                                                                                                                         ]note: build failure may have been caused by lack of free disk space
builder for `/gnu/store/4mvzzx2jmr4r4p2kx0hcvwr9s9lvx0gd-ungoogled-chromium-72.0.3626.109.drv' failed with exit code 1
build of /gnu/store/4mvzzx2jmr4r4p2kx0hcvwr9s9lvx0gd-ungoogled-chromium-72.0.3626.109.drv failed
View build log at '/var/log/guix/drvs/4m/vzzx2jmr4r4p2kx0hcvwr9s9lvx0gd-ungoogled-chromium-72.0.3626.109.drv.bz2'.
guix package: error: build of `/gnu/store/4mvzzx2jmr4r4p2kx0hcvwr9s9lvx0gd-ungoogled-chromium-72.0.3626.109.drv' failed
--8<---------------cut here---------------end--------------->8---

and checking the build logs it's clear my problem is lack of space in /tmp

I created a dedicated folder in $HOME and tried using that as TMPDIR
with this command:

--8<---------------cut here---------------start------------->8---
env TMPDIR=/home/giovanni/.ungoogled-chromium-build guix package -i ungoogled-chromium
--8<---------------cut here---------------end--------------->8---

but no file gets unpacked there

please how can I set a different TMPDIR for the build process?

I'd prefer to avoid building, but it would be a nice exercise to
learn... :-)

thanks!
Giovanni

-- 
Giovanni Biscuolo

Xelera IT Infrastructures