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-rw-r--r--CabalHelper/Compile.hs18
1 files changed, 17 insertions, 1 deletions
diff --git a/CabalHelper/Compile.hs b/CabalHelper/Compile.hs
index 85d4370..54771b1 100644
--- a/CabalHelper/Compile.hs
+++ b/CabalHelper/Compile.hs
@@ -316,8 +316,24 @@ patchyCabalVersions = [
let versionFile = dir </> "Distribution/Version.hs"
versionFileTmp = versionFile ++ ".tmp"
+ let languagePragma =
+ "{-# LANGUAGE DeriveDataTypeable, StandaloneDeriving #-}"
+ languagePragmaCPP =
+ "{-# LANGUAGE CPP, DeriveDataTypeable, StandaloneDeriving #-}"
+
+ derivingDataVersion =
+ "deriving instance Data Version"
+ derivingDataVersionCPP = unlines [
+ "#if __GLASGOW_HASKELL__ < 707",
+ derivingDataVersion,
+ "#endif"
+ ]
+
vf <- readFile versionFile
- writeFile versionFileTmp $ replace "deriving instance Data Version" "" vf
+ writeFile versionFileTmp
+ $ replace derivingDataVersion derivingDataVersionCPP
+ $ replace languagePragma languagePragmaCPP vf
+
renameFile versionFileTmp versionFile
unpackPatchedCabal ::