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-rw-r--r--pkgs/development/compilers/ghc/8.6.1.nix3
1 files changed, 2 insertions, 1 deletions
diff --git a/pkgs/development/compilers/ghc/8.6.1.nix b/pkgs/development/compilers/ghc/8.6.1.nix
index 62ea39791b90..a2be9d255713 100644
--- a/pkgs/development/compilers/ghc/8.6.1.nix
+++ b/pkgs/development/compilers/ghc/8.6.1.nix
@@ -86,7 +86,8 @@ stdenv.mkDerivation (rec {
     sha256 = "0dkh7idgrqr567fq94a0f5x3w0r4cm2ydn51nb5wfisw3rnw499c";
   };
 
-  enableParallelBuilding = true;
+  # https://ghc.haskell.org/trac/ghc/ticket/15449
+  enableParallelBuilding = !buildPlatform.isAarch64;
 
   outputs = [ "out" "doc" ];