hadrian: Don't read package environments in ghc-stage1 wrapperwip/21803

The stage1 compiler may be on the brink of existence and not have even a
working base library. You may have installed packages globally with a
similar stage2 compiler which will then lead to arguments such as
--show-iface not even working because you are passing too many package
flags. The solution is simple, don't read these implicit files.

Fixes #21803

1 files changed, 1 insertions, 0 deletions

diff --git a/hadrian/src/Rules/Generate.hs b/hadrian/src/Rules/Generate.hs
index 33a392fc33..8fcb8e4e00 100644
--- a/hadrian/src/Rules/Generate.hs
+++ b/hadrian/src/Rules/Generate.hs
@@ -235,6 +235,7 @@ ghcWrapper stage  = do
     return $ unwords $ map show $ [ ghcPath ]
                                ++ (if stage == Stage1
                                      then ["-no-global-package-db"
+                                          , "-package-env=-"
                                           , "-package-db " ++ dbPath
                                           ]
                                      else [])