Can't build shake-based nofib with GHC 9.1.0.20201210

Reproducer:

cabal new-run -- nofib-run --compiler=/Users/nineonine/Projects/ghc/_build/stage1/bin/ghc  --output=test

this returns:

cabal: Failed to build primitive-0.7.1.0 (which is required by
unboxed-ref-0.4.0.0).

full log: https://gitlab.haskell.org/-/snippets/1855