io-classes: init at github:input-output-hk/io-sim/dcafd44cdc101a3e213de6a2d5ba7f674c2bc13c

horizon.dhall

@@ -195,6 +195,7 @@ let otherLibraries =
       , H.callHackage "hxt-charproperties" "9.5.0.0"
       , H.callHackage "hxt-regex-xmlschema" "9.2.0.7"
       , H.callHackage "hxt-unicode" "9.0.2.4"
+      , callIoSim "io-classes" "io-classes"
       , H.callHackage "inline-c" "0.9.1.6"
       , H.callCabal2nix
           "inline-r"

overlay.nix

@@ -149,6 +149,8 @@ final: prev: with pkgs.haskell.lib; {
 
   int-cast = final.callPackage (./pkgs/int-cast.nix) { };
 
+  io-classes = final.callPackage (./pkgs/io-classes.nix) { };
+
   lazy-search = final.callPackage (./pkgs/lazy-search.nix) { };
 
   lazysmallcheck = final.callPackage (./pkgs/lazysmallcheck.nix) { };

pkgs/io-classes.nix

+{ mkDerivation
+, QuickCheck
+, array
+, async
+, base
+, bytestring
+, deque
+, fetchgit
+, lib
+, mtl
+, stm
+, tasty
+, tasty-quickcheck
+, time
+}:
+mkDerivation {
+  pname = "io-classes";
+  version = "0.4.0.0";
+  src = fetchgit {
+    url = "https://github.com/input-output-hk/io-sim";
+    sha256 = "0xcb7j2wcc5zpgjvl1ly0sn7hvdwm51sbcyl5ncva1s1yfg5prsk";
+    rev = "dcafd44cdc101a3e213de6a2d5ba7f674c2bc13c";
+    fetchSubmodules = true;
+  };
+  postUnpack = "sourceRoot+=/io-classes/; echo source root reset to $sourceRoot";
+  isLibrary = true;
+  isExecutable = false;
+  enableSeparateDataOutput = false;
+  libraryHaskellDepends = [
+    array
+    async
+    base
+    bytestring
+    deque
+    mtl
+    stm
+    time
+  ];
+  testHaskellDepends = [ base QuickCheck tasty tasty-quickcheck ];
+  enableLibraryProfiling = true;
+  enableExecutableProfiling = true;
+  doHaddock = false;
+  jailbreak = true;
+  doCheck = false;
+  doBenchmark = false;
+  hyperlinkSource = false;
+  description = "Type classes for concurrency with STM, ST and timing";
+  license = lib.licenses.asl20;
+  broken = false;
+}