Simplify Stack usage in Nix #9855

Job	Run time
build ucm (ubuntu-20.04)	26m 28s
ormolu	11s
build ucm (macOS-13)	42m 21s
build ucm (windows-2019)	32m 31s
generate jit source	45s
run interpreter tests (ubuntu-20.04)	1m 2s
run transcripts (ubuntu-20.04)	4m 12s
run interpreter tests (macos-13)	2m 11s
run transcripts (macos-13)	6m 55s
run transcripts (windows-2019)	7m 29s
build jit binary / build jit binary (ubuntu-20.04)	11s
build jit binary / build jit binary (macOS-13)	21s
build jit binary / build jit binary (windows-2019)	57s
test jit / test jit (ubuntu-20.04)	13s
test jit / test jit (macOS-13)	16s
	2h 6m 3s

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