`ghcup whereis ghc` reports incorrect binnary locations for non-standard versions (e.g. `8.10.7-p1`)

$ ghcup whereis ghc 8.10.7-dyn
/home/hasufell/.ghcup/ghc/8.10.7-dyn/bin/ghc-8.10.7-dyn

$ ls -lah /home/hasufell/.ghcup/ghc/8.10.7-dyn/bin/
drwxr-xr-x hasufell hasufell   4 KB Sat Nov 20 20:43:45 2021  .
drwxr-xr-x hasufell hasufell   4 KB Sat Nov 20 20:44:07 2021  ..
lrwxrwxrwx hasufell hasufell  10 B  Sat Nov 20 20:43:45 2021  ghc ⇒ ghc-8.10.7
.rwxr-xr-x hasufell hasufell 368 B  Sat Nov 20 20:43:45 2021  ghc-8.10.7
lrwxrwxrwx hasufell hasufell  14 B  Sat Nov 20 20:43:45 2021  ghc-pkg ⇒ ghc-pkg-8.10.7
.rwxr-xr-x hasufell hasufell 400 B  Sat Nov 20 20:43:45 2021  ghc-pkg-8.10.7
lrwxrwxrwx hasufell hasufell  11 B  Sat Nov 20 20:43:45 2021  ghci ⇒ ghci-8.10.7
.rwxr-xr-x hasufell hasufell  88 B  Sat Nov 20 20:43:45 2021  ghci-8.10.7
lrwxrwxrwx hasufell hasufell  18 B  Sat Nov 20 20:43:45 2021  haddock ⇒ haddock-ghc-8.10.7
.rwxr-xr-x hasufell hasufell 359 B  Sat Nov 20 20:43:45 2021  haddock-ghc-8.10.7
.rwxr-xr-x hasufell hasufell 332 B  Sat Nov 20 20:43:45 2021  hp2ps
.rwxr-xr-x hasufell hasufell 330 B  Sat Nov 20 20:43:45 2021  hpc
.rwxr-xr-x hasufell hasufell   1 KB Sat Nov 20 20:43:45 2021  hsc2hs
lrwxrwxrwx hasufell hasufell  13 B  Sat Nov 20 20:43:45 2021  runghc ⇒ runghc-8.10.7
.rwxr-xr-x hasufell hasufell 377 B  Sat Nov 20 20:43:45 2021  runghc-8.10.7
lrwxrwxrwx hasufell hasufell   6 B  Sat Nov 20 20:43:45 2021  runhaskell ⇒ runghc