diff --git a/pkgs/development/libraries/gmp/5.0.5.nix b/pkgs/development/libraries/gmp/5.0.5.nix
index 3fb62585051..98ebe5fcc25 100644
--- a/pkgs/development/libraries/gmp/5.0.5.nix
+++ b/pkgs/development/libraries/gmp/5.0.5.nix
@@ -13,8 +13,10 @@ stdenv.mkDerivation rec {
   buildNativeInputs = [ m4 ];
 
   configureFlags =
-    # Build a "fat binary", with routines for several sub-architectures (x86).
-    [ "--enable-fat" ]
+    # Build a "fat binary", with routines for several sub-architectures
+    # (x86), except on Solaris where some tests crash with "Memory fault".
+    # See <http://hydra.nixos.org/build/2760931>, for instance.
+    (stdenv.lib.optional (!stdenv.isSunOS) "--enable-fat")
     ++ (if cxx then [ "--enable-cxx" ] else [ "--disable-cxx" ]);
 
   doCheck = true;