guix pull succeeded eventually. I looked at the error once again. It looks like it failed earlier because graphviz-minimal@7.0.1 failed to build, which was reported after glib@2.78.0 compiled but error on some test. So, I garbage-collected it and tried to build once again without substitutes. This time, it succeeded. Probably, it just ran out of memory the previous time. Since I cannot reproduce this issue anymore, I will close it.
Roman
pgpxKGZEi32KS.pgp
Description: PGP signature
