internal/nix: fix unredacted error message (#1782) #198

Job	Run time
tests / Spell Check with Typos	7s
tests / build-devbox (ubuntu-latest)	19s
tests / build-devbox (macos-latest)	39s
tests / auto-nix-install (ubuntu-latest)	37s
tests / golangci-lint (ubuntu-latest)	49s
tests / test (not-main, ubuntu-latest, project-tests, 2.12.0)	12m 4s
tests / auto-nix-install (macos-latest)	2m 36s
tests / test-nix-versions (ubuntu-latest, 2.15.1)	42s
tests / golangci-lint (macos-latest)	5m 47s
tests / test (not-main, ubuntu-latest, project-tests, 2.19.2)	9m 18s
tests / test-nix-versions (ubuntu-latest, 2.16.1)	40s
tests / test (not-main, ubuntu-latest, project-tests, 2.20.1)	10m 29s
tests / test-nix-versions (ubuntu-latest, 2.17.0)	44s
tests / test (not-main, ubuntu-latest, project-tests-off, 2.12.0)	4m 25s
tests / test-nix-versions (ubuntu-latest, 2.18.0)	44s
tests / test (not-main, ubuntu-latest, project-tests-off, 2.19.2)	4m 28s
tests / test-nix-versions (ubuntu-latest, 2.19.2)	37s
tests / test (not-main, ubuntu-latest, project-tests-off, 2.20.1)	3m 51s
tests / test-nix-versions (macos-latest, 2.15.1)	2m 29s
tests / test (not-main, macos-latest, project-tests-off, 2.12.0)	17m 6s
tests / test-nix-versions (macos-latest, 2.16.1)	2m 40s
tests / test-nix-versions (macos-latest, 2.17.0)	2m 24s
tests / test (not-main, macos-latest, project-tests-off, 2.19.2)	16m 23s
tests / test-nix-versions (macos-latest, 2.18.0)	3m 12s
tests / test (not-main, macos-latest, project-tests-off, 2.20.1)	18m 34s
tests / test-nix-versions (macos-latest, 2.19.2)	2m 28s
release	3m 22s
edge	0s
	2h 7m 34s

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