haskell-spawn: new package, v0.3

pkgs/development/libraries/haskell/spawn/default.nix

@@ -0,0 +1,12 @@
+{ cabal }:
+
+cabal.mkDerivation (self: {
+  pname = "spawn";
+  version = "0.3";
+  sha256 = "0xkkl0w30rqif2jwdzjv239raly4yaf0116vkqcwh1i41jqn7ij8";
+  meta = {
+    description = "Tiny library for concurrent computations";
+    license = self.stdenv.lib.licenses.bsd3;
+    platforms = self.ghc.meta.platforms;
+  };
+})

pkgs/top-level/haskell-packages.nix

@@ -1982,6 +1982,8 @@ self : let callPackage = x : y : modifyPrio (newScope self x y); in
 
   sparse = callPackage ../development/libraries/haskell/sparse {};
 
+  spawn = callPackage ../development/libraries/haskell/spawn {};
+
   speculation = callPackage ../development/libraries/haskell/speculation {};
 
   spoon = callPackage ../development/libraries/haskell/spoon {};