diff --git a/pkgs/development/compilers/elm/default.nix b/pkgs/development/compilers/elm/default.nix
index 4520363a53b2..d2e9ce0f3059 100644
--- a/pkgs/development/compilers/elm/default.nix
+++ b/pkgs/development/compilers/elm/default.nix
@@ -91,6 +91,8 @@ let
         # https://github.com/elm-lang/elm-compiler/issues/1566
         indents = hlib.overrideCabal super.indents (drv: {
           version = "0.3.3";
+          #test dep tasty has a version mismatch
+          doCheck = false;
           sha256 = "16lz21bp9j14xilnq8yym22p3saxvc9fsgfcf5awn2a6i6n527xn";
           libraryHaskellDepends = drv.libraryHaskellDepends ++ [super.concatenative];
         });
diff --git a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
index 757c1d8c32d8..4ea4a5c28465 100644
--- a/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
+++ b/pkgs/development/haskell-modules/configuration-ghc-8.0.x.nix
@@ -66,6 +66,13 @@ self: super: {
   inline-c = super.inline-c_0_5_6_1;
   inline-c-cpp = super.inline-c-cpp_0_1_0_0;
 
+  # test dep hedgehog pulls in concurrent-output, which does not build
+  # due to processing version mismatch
+  either = dontCheck super.either;
+
+  # test dep tasty has a version mismatch
+  indents = dontCheck super.indents;
+
   # Newer versions require GHC 8.2.
   haddock-api = self.haddock-api_2_17_4;
   haddock = self.haddock_2_17_5;