first upgrade:
"+ ungoogled-chromium   84.0.4147.105-0.cc3e311 out     /gnu/store/2p0qimpqq2sr2l0pi97bhxjvmjq5g40l-ungoogled-chromium-84.0.4147.105-0.cc3e311
 + graphviz     2.42.3  out     /gnu/store/lhsyv6isx5fxl3zkhq659prvsbl5c5wb-graphviz-2.42.3
 - ungoogled-chromium   84.0.4147.89-0.df199c0  out     /gnu/store/63pyj6w0sgv1pjhp2v7x2zx4dhad4i49-ungoogled-chromium-84.0.4147.89-0.df199c0
 - graphviz     2.42.3  out     /gnu/store/vj3psajlyqmfjdsk1l1gr2114kqc5zzr-graphviz-2.42.3"