From 1c0f2e8c403126acecfd6d6cccf2ad0b20f38929 Mon Sep 17 00:00:00 2001
From: Daniel Gröber <dxld@darkboxed.org>
Date: Sat, 11 Jan 2020 05:08:03 +0100
Subject: Unset GHC_ENVIRONMENT and GHC_PACKAGE_PATH before invocing GHC

When we are invoked under Stack (as part of HIE's test suite for example)
our choice of Cabal library when invoking GHC gets interferred with by the
GHC_ENVIRONMENT variable.

Since we're just using boot packages simply unsetting GHC package related
envvars seems like a fairly decent fix here. See the issue below for more
details.

Fixes #78
---
 src/CabalHelper/Compiletime/Types.hs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

(limited to 'src/CabalHelper/Compiletime/Types.hs')

diff --git a/src/CabalHelper/Compiletime/Types.hs b/src/CabalHelper/Compiletime/Types.hs
index 99766dd..ab84178 100644
--- a/src/CabalHelper/Compiletime/Types.hs
+++ b/src/CabalHelper/Compiletime/Types.hs
@@ -570,9 +570,10 @@ defaultPrograms =
   Programs "cabal" [] []  "stack" [] [] [] "ghc" "ghc-pkg" "haddock"
 
 data EnvOverride
-    = EnvPrepend String
+    = EnvUnset
+    | EnvSet String
     | EnvAppend String
-    | EnvReplace String
+    | EnvPrepend String
       deriving (Eq, Ord, Show, Read, Generic, Typeable)
 
 data CompileOptions = CompileOptions
-- 
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