ci: fix tests #542

Job	Run time
act-support (ubuntu-latest)	1m 37s
custom-nix-path (ubuntu-latest)	24s
extra-nix-config (ubuntu-latest)	22s
flakes (ubuntu-latest)	40s
custom-nix-path (macos-latest)	57s
extra-nix-config (macos-latest)	56s
flakes (macos-latest)	1m 17s
installer-options (ubuntu-latest)	29s
custom-nix-path (macos-13)	1m 38s
flakes (macos-13)	1m 39s
extra-nix-config (macos-13)	1m 27s
installer-options (macos-13)	2m 38s
oldest-supported-installer (ubuntu-latest)	22s
simple-build (ubuntu-latest)	23s
oldest-supported-installer (macos-latest)	54s
simple-build (macos-latest)	1m 1s
oldest-supported-installer (macos-13)	1m 39s
simple-build (macos-13)	1m 36s
	19m 59s

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