ghc-prim-0.7.0. docs don't have GHC.Prim module shown
See https://hackage.haskell.org/package/ghc-prim-0.7.0 The module is documented for https://hackage.haskell.org/package/ghc-prim-0.6.1/docs/GHC-Prim.html which I guess was built with make.
GHC.Prim module is virtual. I suspect there was some bit of magic involved to create its haddocks.
The module is documented in bundled documentation though of GHC-9.2.1-rc1: https://downloads.haskell.org/ghc/9.2.1-alpha2/docs/html/libraries/ghc-prim-0.8.0/GHC-Prim.html