nr@homedog ~> ghc-8.10.7 -v -clear-package-db -package-db $STAGE1/lib/package.conf.d -v
Glasgow Haskell Compiler, Version 8.10.7, stage 2 booted by GHC version 8.10.4
*** initializing package database:
Using binary package database: /home/nr/asterius/ghc/_build/stage1/lib/package.conf.d/package.cache
package flags []
loading package database /home/nr/asterius/ghc/_build/stage1/lib/package.conf.d
wired-in package ghc-prim mapped to ghc-prim-0.8.0
wired-in package integer-wired-in mapped to integer-gmp-1.1
wired-in package base mapped to base-4.16.0.0
wired-in package rts mapped to rts-1.0.2
wired-in package template-haskell mapped to template-haskell-2.18.0.0
wired-in package ghc mapped to ghc-9.3
!!! initializing package database: finished in 7.82 milliseconds, allocated 8.501 megabytes
*** Deleting temp files:
Deleting: 
*** Deleting temp dirs:
Deleting: 
ghc: no input files
Usage: For basic information, try the `--help' option.
nr@homedog ~ [1]> ghc-9.0.1 -v -clear-package-db -package-db $STAGE1/lib/package.conf.d -v
Loaded package environment from /home/nr/.ghc/x86_64-linux-9.0.1/environments/default
Glasgow Haskell Compiler, Version 9.0.1, stage 2 booted by GHC version 8.8.3
*** initializing unit database:
Using binary package database: /home/nr/.ghcup/ghc/9.0.1/lib/ghc-9.0.1/package.conf.d/package.cache
Using binary package database: /home/nr/.cabal/store/ghc-9.0.1/package.db/package.cache
package flags [-package-id ghc-9.0.1{unit ghc-9.0.1 True ([])},
               -package-id bytestring-0.10.12.1{unit bytestring-0.10.12.1 True ([])},
               -package-id unix-2.7.2.2{unit unix-2.7.2.2 True ([])},
               -package-id base-4.15.0.0{unit base-4.15.0.0 True ([])},
               -package-id time-1.9.3{unit time-1.9.3 True ([])},
               -package-id hpc-0.6.1.0{unit hpc-0.6.1.0 True ([])},
               -package-id filepath-1.4.2.1{unit filepath-1.4.2.1 True ([])},
               -package-id process-1.6.11.0{unit process-1.6.11.0 True ([])},
               -package-id array-0.5.4.0{unit array-0.5.4.0 True ([])},
               -package-id integer-gmp-1.1{unit integer-gmp-1.1 True ([])},
               -package-id containers-0.6.4.1{unit containers-0.6.4.1 True ([])},
               -package-id ghc-boot-9.0.1{unit ghc-boot-9.0.1 True ([])},
               -package-id binary-0.8.8.0{unit binary-0.8.8.0 True ([])},
               -package-id ghc-prim-0.7.0{unit ghc-prim-0.7.0 True ([])},
               -package-id ghci-9.0.1{unit ghci-9.0.1 True ([])},
               -package-id rts{unit rts True ([])},
               -package-id terminfo-0.4.1.4{unit terminfo-0.4.1.4 True ([])},
               -package-id transformers-0.5.6.2{unit transformers-0.5.6.2 True ([])},
               -package-id deepseq-1.4.5.0{unit deepseq-1.4.5.0 True ([])},
               -package-id ghc-boot-th-9.0.1{unit ghc-boot-th-9.0.1 True ([])},
               -package-id pretty-1.1.3.6{unit pretty-1.1.3.6 True ([])},
               -package-id template-haskell-2.17.0.0{unit template-haskell-2.17.0.0 True ([])},
               -package-id directory-1.3.6.1{unit directory-1.3.6.1 True ([])},
               -package-id text-1.2.4.1{unit text-1.2.4.1 True ([])},
               -package-id ghc-paths-0.1.0.12-3f4623015bdeee15e2d2cf4307a5331bbd2d0c0ee8ac137a5857a6db6f44b0cc{unit ghc-paths-0.1.0.12-3f4623015bdeee15e2d2cf4307a5331bbd2d0c0ee8ac137a5857a6db6f44b0cc True ([])}]
loading package database /home/nr/.ghcup/ghc/9.0.1/lib/ghc-9.0.1/package.conf.d
loading package database /home/nr/.cabal/store/ghc-9.0.1/package.db
wired-in package ghc-prim mapped to ghc-prim-0.7.0
wired-in package ghc-bignum mapped to ghc-bignum-1.0
wired-in package base mapped to base-4.15.0.0
wired-in package rts mapped to rts
wired-in package template-haskell mapped to template-haskell-2.17.0.0
wired-in package ghc mapped to ghc-9.0.1
!!! initializing unit database: finished in 15.03 milliseconds, allocated 12.331 megabytes
*** Deleting temp files:
Deleting: 
*** Deleting temp dirs:
Deleting: 
ghc: no input files
Usage: For basic information, try the `--help' option.