diff --git a/srcpkgs/ghc/template b/srcpkgs/ghc/template
index e95b338c87a..0186d9dc4df 100644
--- a/srcpkgs/ghc/template
+++ b/srcpkgs/ghc/template
@@ -1,7 +1,7 @@
 # Template file for 'ghc'
 pkgname=ghc
 # Keep this synchronized with http://www.stackage.org/lts
-version=8.6.3
+version=8.6.4
 revision=1
 wrksrc="ghc-${version%[!0-9]}"
 patch_args="-Np1"
@@ -15,7 +15,7 @@ maintainer="Leah Neukirchen <leah@vuxu.org>"
 license="BSD"
 homepage="http://www.haskell.org/ghc/"
 distfiles="http://www.haskell.org/ghc/dist/${version%[!0-9]}/${pkgname}-${version%[!0-9]}-src.tar.xz"
-checksum=9f9e37b7971935d88ba80426c36af14b1e0b3ec1d9c860f44a4391771bc07f23
+checksum=5b5d07e4463203a433c3ed3df461ba6cce11b6d2b9b264db31f3429075d0303a
 nocross=yes  # ask leah2 before wasting time trying to do that
 _bindir="/usr/lib/${pkgname}-${version}/bin"
 nopie_files="