second upgrade:
"+ ungoogled-chromium   84.0.4147.105-0.cc3e311 out     /gnu/store/0qa4wqd8x9kmzjg5as73ns22badna2cv-ungoogled-chromium-84.0.4147.105-0.cc3e311
 + graphviz     2.42.3  out     /gnu/store/my0q5x305qb5av0jz20bjr26a0ql8w9w-graphviz-2.42.3
 - 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"