Dear, I think the fallback with SWH is broken. Here an example to reproduce.
--8<---------------cut here---------------start------------->8--- cd /tmp/ tar -xvf $(guix build -S hello) cd hello-2.10 git init git add * git commit -m 'init' --8<---------------cut here---------------end--------------->8--- Then I push this fresh repo to my own GitHub account. Because it is easy to switch between public and private state option, which mimics upstream loss. Let create the well-known "hello" recipe, which is simply a copy/paste of (gnu packages base). --8<---------------cut here---------------start------------->8--- (define-module (hello) #:use-module (guix packages) #:use-module (guix build-system gnu) #:use-module (guix git-download) #:use-module (guix licenses)) (define-public hi (package (name "hi") (version "2.10") (source (origin (method git-fetch) (uri (git-reference (url "https://github.com/zimoun/hello-example.git") (commit "e1eefd033b8a2c4c81babc6fde08ebb116c6abb8"))) (sha256 (base32 "1im1gglfm4k10bh4mdaqzmx3lm3kivnsmxrvl6vyvmfqqzljq75l")))) (build-system gnu-build-system) (synopsis "Hello, GNU world: An example GNU package") (description "GNU Hello prints the message \"Hello, world!\" and then exits. It serves as an example of standard GNU coding practices. As such, it supports command-line arguments, multiple languages, and so on.") (home-page "https://www.gnu.org/software/hello/") (license gpl3+))) --8<---------------cut here---------------end--------------->8--- For the sanity of the test, "guix build -L . hi" builds correctly and returns the item: /gnu/store/jn8d031zx4znxy7s5zhj4dbr6xjsfq9v-hi-2.10 with Guix b7249aa. The upstream source is archived on SWH with: guix lint -L . hi -c archival see https://archive.softwareheritage.org/browse/origin/directory/?origin_url=https://github.com/zimoun/hello-example.git and the logs in https://archive.softwareheritage.org/save/#requests Note that running again "lint -c archival" returns nothing, which means that the linter finds it on SWH, I guess. Well, I have not checked what 'lookup-content' returns yet. However, I filtered the first ~2000+ 'packages-with-sources' with 'lookup-content' and all the 'git-fetch' sources are returned #f, and some 'url-fetch' not. Another story, another thread. :-) Let clean the previous builds and downloads: guix gc -D $(guix gc --list-dead | grep -E '(hi-2|git-checkout)') And now let turn off upstream and so the maybe bug: --8<---------------cut here---------------start------------->8--- guix build -L . hi The following derivations will be built: /gnu/store/x5vwhv8sn3l49vysq98j7h2rqqlff5zp-hi-2.10.drv /gnu/store/jn6f86hg9zyyhms1vn56hviv4m9yjm8j-git-checkout.drv building /gnu/store/jn6f86hg9zyyhms1vn56hviv4m9yjm8j-git-checkout.drv... guile: warning: failed to install locale environment variable `PATH' set to `/gnu/store/378zjf2kgajcfd7mfr98jn5xyc5wa3qv-gzip-1.10/bin:/gnu/store/sf3rbvb6iqcphgm1afbplcs72hsywg25-tar-1.32/bin' Initialized empty Git repository in /gnu/store/884nsva9r8wkp40kbqyvpj1ad57jc5dd-git-checkout/.git/ fatal: could not read Username for 'https://github.com': No such device or address Failed to do a shallow fetch; retrying a full fetch... fatal: could not read Username for 'https://github.com': No such device or address git-fetch: '/gnu/store/i2pkspl2vjvas0q85hw46y2li06rcmcg-git-minimal-2.26.2/bin/git fetch origin' failed with exit code 128 Trying content-addressed mirror at berlin.guixsd.org... Trying content-addressed mirror at berlin.guixsd.org... Trying to download from Software Heritage... Backtrace: 4 (primitive-load "/gnu/store/s56y8npabah6jc1bqrhsac6wqb1?") In ./guix/swh.scm: 573:13 3 (swh-download "https://github.com/zimoun/hello-example?" ?) 224:22 2 (call "https://archive.softwareheritage.org/api/1/revi?" ?) In web/client.scm: 563:0 1 (http-get "https://archive.softwareheritage.org/api/1/?" ?) 231:6 0 (tls-wrap #<closed: file 7ffff5f1b690> _ # _) web/client.scm:231:6: In procedure tls-wrap: Error while printing exception. builder for `/gnu/store/jn6f86hg9zyyhms1vn56hviv4m9yjm8j-git-checkout.drv' failed with exit code 1 build of /gnu/store/jn6f86hg9zyyhms1vn56hviv4m9yjm8j-git-checkout.drv failed View build log at '/var/log/guix/drvs/jn/6f86hg9zyyhms1vn56hviv4m9yjm8j-git-checkout.drv.bz2'. cannot build derivation `/gnu/store/x5vwhv8sn3l49vysq98j7h2rqqlff5zp-hi-2.10.drv': 1 dependencies couldn't be built guix build: error: build of `/gnu/store/x5vwhv8sn3l49vysq98j7h2rqqlff5zp-hi-2.10.drv' failed --8<---------------cut here---------------end--------------->8--- Let me know if moreinfo are required. All the best, simon