diff --git a/pkgs/development/haskell-modules/hackage-packages.nix b/pkgs/development/haskell-modules/hackage-packages.nix
index d18f4ca5125b..d5d50be45190 100644
--- a/pkgs/development/haskell-modules/hackage-packages.nix
+++ b/pkgs/development/haskell-modules/hackage-packages.nix
@@ -14260,6 +14260,7 @@ self: {
        libraryHaskellDepends = [ base system-filepath text ];
        executableHaskellDepends = [ base system-filepath text ];
        testHaskellDepends = [ base hspec system-filepath text ];
+       doCheck = false; # depends on an ancient version of hspec
        homepage = "http://github.com/rampion/ReadArgs";
        description = "Simple command line argument parsing";
        license = stdenv.lib.licenses.bsd3;
@@ -95186,6 +95187,9 @@ self: {
        description = "A Haskell backend kernel for the IPython project";
        license = stdenv.lib.licenses.mit;
        hydraPlatforms = stdenv.lib.platforms.none;
+       # GHC 8 not supported yet: https://github.com/gibiansky/IHaskell/issues/690
+       # GHC 7.10 build fails on various dependencies
+       broken = true;
      }) {};
 
   "ihaskell-aeson" = callPackage
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index cfd174106ba4..9f6623d57e7c 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2156,8 +2156,8 @@ in
   ihaskell = callPackage ../development/tools/haskell/ihaskell/wrapper.nix {
     inherit (haskellPackages) ihaskell ghcWithPackages;
 
-    ipython = pythonFull.buildEnv.override {
-      extraLibs = with pythonPackages; [ ipython ipykernel jupyter_client notebook ];
+    ipython = python3.buildEnv.override {
+      extraLibs = with python3Packages; [ ipython ipykernel jupyter_client notebook ];
     };
 
     packages = config.ihaskell.packages or (self: []);