Index: head/lang/ghc/Makefile
===================================================================
--- head/lang/ghc/Makefile
+++ head/lang/ghc/Makefile
@@ -95,6 +95,10 @@
 LLVM_VERSION=		60
 .endif
 
+.if ${ARCH} == powerpc64
+CONFIGURE_ARGS+=	--enable-dtrace=0
+.endif
+
 .if ${ARCH} == amd64 || ${ARCH} == i386
 BOOT_GHC_VERSION=	8.4.3
 .else
Index: head/lang/ghc/files/patch-ppc64
===================================================================
--- head/lang/ghc/files/patch-ppc64
+++ head/lang/ghc/files/patch-ppc64
@@ -411,7 +411,7 @@
     -------------------------------------------------------------------------- */
  
 -#if defined(powerpc64_HOST_ARCH)
-+#if defined(ELF_V1)
++#if defined(_CALL_ELF) && (_CALL_ELF == 1)
  
 -#if defined(linux_HOST_OS)
  static void GNUC3_ATTRIBUTE(used)
@@ -428,7 +428,7 @@
 -#endif
 -
 -#if defined(powerpc64le_HOST_ARCH)
-+#if defined(ELF_V2)
++#if defined(_CALL_ELF) && (_CALL_ELF == 2)
  /* -----------------------------------------------------------------------------
     PowerPC 64 little endian architecture