chore: making `nixpkgs-matrix` an indirect input #71

Job	Run time
Check / Lint	42s
Build / Pull Request	0s
Check / Build	26s
Check / Matrix	4s
Check / Test (tests/acl)	25s
Check / Test (tests/audit)	26s
Check / Test (tests/bootstrap)	31s
Check / Test (tests/claims)	26s
Check / Test (tests/client)	1m 11s
Check / Test (tests/discovery)	1m 45s
Check / Test (tests/gestalts)	1m 47s
Check / Test (tests/git)	26s
Check / Test (tests/http)	26s
Check / Test (tests/identities)	26s
Check / Test (tests/ids)	22s
Check / Test (tests/keys)	1m 7s
Check / Test (tests/network)	20s
Check / Test (tests/nodes)	2m 20s
Check / Test (tests/notifications)	1m 15s
Check / Test (tests/schema)	25s
Check / Test (tests/sessions)	26s
Check / Test (tests/sigchain)	52s
Check / Test (tests/status)	26s
Check / Test (tests/tasks)	42s
Check / Test (tests/tokens)	31s
Check / Test (tests/utils)	23s
Check / Test (tests/validation)	23s
Check / Test (tests/vaults)	4m 7s
Check / Test (tests/workers)	27s
Check / Test (tests/PolykeyAgent.test.ts)	43s
Check / Test (tests/PolykeyClient.test.ts)	36s
Check / Test (tests/index.test.ts)	35s
Check / Test (tests/scratch.test.ts)	19s
Check / Test (tests/utils.test.ts)	21s
Check / Coverage	12s
Integration / Merge	0s
	25m 53s

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