diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index a72145562d40..a9a26a988c08 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -3896,6 +3896,11 @@
     github = "pierrechevalier83";
     name = "Pierre Chevalier";
   };
+  pierreis = {
+    email = "pierre@pierre.is";
+    github = "pierreis";
+    name = "Pierre Matri";
+  };
   pierrer = {
     email = "pierrer@pi3r.be";
     github = "pierrer";
diff --git a/pkgs/development/libraries/folly/default.nix b/pkgs/development/libraries/folly/default.nix
index d2f66ad55f0d..00ac6abbc8eb 100644
--- a/pkgs/development/libraries/folly/default.nix
+++ b/pkgs/development/libraries/folly/default.nix
@@ -3,13 +3,13 @@
 
 stdenv.mkDerivation rec {
   name = "folly-${version}";
-  version = "2019.04.22.00";
+  version = "2019.05.27.00";
 
   src = fetchFromGitHub {
     owner = "facebook";
     repo = "folly";
     rev = "v${version}";
-    sha256 = "08aniprv2a96d3k36k668maq9nysxh0cm58i0hvy71cqcmc97h7p";
+    sha256 = "00xacaziqllps069xzg7iz68rj5hr8mj3rbi4shkrr9jq51y9ikj";
   };
 
   nativeBuildInputs = [ cmake ];
@@ -32,7 +32,7 @@ stdenv.mkDerivation rec {
     homepage = https://github.com/facebook/folly;
     license = licenses.asl20;
     # 32bit is not supported: https://github.com/facebook/folly/issues/103
-    platforms = [ "x86_64-linux" ];
-    maintainers = with maintainers; [ abbradar ];
+    platforms = [ "x86_64-linux" "x86_64-darwin" ];
+    maintainers = with maintainers; [ abbradar pierreis ];
   };
 }