When searching for packages, rule out incompatible TTC versions #1119

Job	Run time
initialise	3s
quick-check	5m 27s
macos-bootstrap-chez	57s
ubuntu-bootstrap-racket	54s
nix-bootstrap-chez	56s
ubuntu-bootstrap-chez	56s
ubuntu-self-host-previous-version	55s
windows-bootstrap-chez	48s
windows-self-host-racket	1s
ubuntu-self-host-racket	1s
ub-test-frex	1s
ub-test-collie	1s
ub-test-elab-util	1s
ub-pack-test-pack	1s
ub-pack-test-lsp	1s
ub-test-katla-and-html	1s
ubuntu-build-api	1s
ubuntu-self-host-chez	1s
macos-self-host-chez	1s
	11m 7s

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