--- ghc-8.8.0.20190721/configure.ac~	2019-07-22 07:19:41.000000000 +0000
+++ ghc-8.8.0.20190721/configure.ac	2019-07-24 08:13:27.347297256 +0000
@@ -641,9 +641,9 @@
 # tools we are looking for. In the past, GHC supported a number of
 # versions of LLVM simultaneously, but that stopped working around
 # 3.5/3.6 release of LLVM.
-LlvmVersion=7
+LlvmVersion=7.0
 AC_SUBST([LlvmVersion])
-sUPPORTED_LLVM_VERSION=$(echo \($LlvmVersion\) | sed 's/\./,/')
+sUPPORTED_LLVM_VERSION=$(echo $LlvmVersion | sed 's/\./ /')
 AC_DEFINE_UNQUOTED([sUPPORTED_LLVM_VERSION], ${sUPPORTED_LLVM_VERSION}, [The supported LLVM version number])
 
 dnl ** Which LLVM clang to use?
--- ghc-8.8.0.20190721/compiler/llvmGen/LlvmCodeGen/Base.hs~	2019-07-22 07:19:41.000000000 +0000
+++ ghc-8.8.0.20190721/compiler/llvmGen/LlvmCodeGen/Base.hs	2019-07-24 14:37:28.543866692 +0000
@@ -188,7 +188,7 @@
 
 -- | The LLVM Version that is currently supported.
 supportedLlvmVersion :: LlvmVersion
-supportedLlvmVersion = LlvmVersion sUPPORTED_LLVM_VERSION
+supportedLlvmVersion = LlvmVersionOld sUPPORTED_LLVM_VERSION
 
 llvmVersionStr :: LlvmVersion -> String
 llvmVersionStr v =