Fix interpolation #147

Job	Run time
test (ubuntu-latest, nightly)	2m 3s
test-auto-nightly	2m 3s
test (ubuntu-latest, lts)	1m 57s
test-generate	5s
test-auto-nightly-with-explicit	2m 4s
test (ubuntu-latest, lts-22.7, 9.6.4)	2m 0s
test (ubuntu-latest, lts-20.2, 9.2.5)	1m 14s
test (ubuntu-latest, lts-19.33, 9.0.2)	1m 7s
test (ubuntu-latest, lts-18.28, 8.10.7)	1m 1s
test (ubuntu-latest, lts-16.31, 8.8.4)	56s
test (ubuntu-latest, lts-12.26, 8.4.4)	1m 0s
test (macOS-latest, nightly)	4m 19s
test (macOS-latest, lts)	6m 48s
test (macOS-latest, lts-22.7, 9.6.4)	4m 16s
test (macOS-latest, lts-20.2, 9.2.5)	2m 3s
test (macOS-latest, lts-19.33, 9.0.2)	3m 1s
test (macOS-latest, lts-18.28, 8.10.7)	4m 23s
test (macOS-latest, lts-16.31, 8.8.4)	1s
test (macOS-latest, lts-12.26, 8.4.4)	2m 36s
test (windows-latest, nightly)	4m 12s
test (windows-latest, lts)	3m 37s
test (windows-latest, lts-22.7, 9.6.4)	4m 29s
test (windows-latest, lts-20.2, 9.2.5)	4m 9s
test (windows-latest, lts-19.33, 9.0.2)	3m 53s
test (windows-latest, lts-18.28, 8.10.7)	3m 44s
test (windows-latest, lts-16.31, 8.8.4)	3m 39s
test (windows-latest, lts-12.26, 8.4.4)	4m 15s
test-stack-yamls (stack-nightly.yaml)	2m 13s
test-stack-yamls (stack.yaml)	1m 10s
	1h 18m 18s

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