ci: fix latest installer tests #568

Job	Run time
act-support (ubuntu-latest)	1m 45s
custom-nix-path (ubuntu-latest)	35s
flakes (ubuntu-latest)	59s
custom-nix-path (macos-latest)	1m 7s
extra-nix-config (ubuntu-latest)	33s
flakes (macos-latest)	1m 29s
custom-nix-path (macos-13)	1m 50s
latest-installer (ubuntu-latest, x86_64-linux)	43s
flakes (macos-13)	2m 35s
extra-nix-config (macos-latest)	1m 13s
latest-installer (macos-latest, aarch64-darwin)	1m 32s
extra-nix-config (macos-13)	2m 20s
oldest-supported-installer (ubuntu-latest)	26s
latest-installer (macos-13, x86_64-darwin)	2m 38s
oldest-supported-installer (macos-latest)	59s
simple-build (ubuntu-latest)	36s
oldest-supported-installer (macos-13)	1m 58s
simple-build (macos-latest)	1m 13s
simple-build (macos-13)	1m 50s
	26m 21s

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