diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,11 @@
 # ChangeLog hie-bios
 
+## 2020-09-01 - 0.7.1
+
+* Add explicit type for stack.yaml location [#243](https://github.com/mpickering/hie-bios/pull/243)
+  * In particular, fixes a regression with `hie.yaml` and standalone-files for stack
+* Reduce noise in Extra-Source-File field [#239](https://github.com/mpickering/hie-bios/pull/239)
+
 ## 2020-08-27 - 0.7.0
 
 ### New Features
diff --git a/hie-bios.cabal b/hie-bios.cabal
--- a/hie-bios.cabal
+++ b/hie-bios.cabal
@@ -1,6 +1,6 @@
 Cabal-Version:          2.2
 Name:                   hie-bios
-Version:                0.7.0
+Version:                0.7.1
 Author:                 Matthew Pickering <matthewtpickering@gmail.com>
 Maintainer:             Matthew Pickering <matthewtpickering@gmail.com>
 License:                BSD-3-Clause
@@ -16,37 +16,12 @@
                         README.md
                         wrappers/cabal
                         wrappers/cabal.hs
-                        tests/configs/bazel.yaml
-                        tests/configs/bios-1.yaml
-                        tests/configs/bios-2.yaml
-                        tests/configs/bios-3.yaml
-                        tests/configs/bios-4.yaml
-                        tests/configs/bios-5.yaml
-                        tests/configs/cabal-1.yaml
-                        tests/configs/cabal-multi.yaml
-                        tests/configs/ch-cabal.yaml
-                        tests/configs/ch-stack.yaml
-                        tests/configs/default.yaml
-                        tests/configs/dependencies.yaml
-                        tests/configs/direct.yaml
-                        tests/configs/multi.yaml
-                        tests/configs/multi-ch.yaml
-                        tests/configs/multi-stack-with-yaml.yaml
-                        tests/configs/keys-not-unique-fails.yaml
-                        tests/configs/nested-cabal-multi.yaml
-                        tests/configs/nested-stack-multi.yaml
-                        tests/configs/none.yaml
-                        tests/configs/obelisk.yaml
-                        tests/configs/stack-config.yaml
-                        tests/configs/stack-multi.yaml
-                        tests/configs/stack-with-both.yaml
-                        tests/configs/stack-with-yaml.yaml
+                        tests/configs/*.yaml
                         tests/projects/symlink-test/a/A.hs
                         tests/projects/symlink-test/hie.yaml
                         tests/projects/multi-direct/A.hs
                         tests/projects/multi-direct/B.hs
                         tests/projects/multi-direct/hie.yaml
-                        tests/projects/multi-cabal/Setup.hs
                         tests/projects/multi-cabal/app/Main.hs
                         tests/projects/multi-cabal/cabal.project
                         tests/projects/multi-cabal/hie.yaml
@@ -56,11 +31,8 @@
                         tests/projects/monorepo-cabal/hie.yaml
                         tests/projects/monorepo-cabal/A/Main.hs
                         tests/projects/monorepo-cabal/A/A.cabal
-                        tests/projects/monorepo-cabal/A/Setup.hs
                         tests/projects/monorepo-cabal/B/MyLib.hs
                         tests/projects/monorepo-cabal/B/B.cabal
-                        tests/projects/monorepo-cabal/B/Setup.hs
-                        tests/projects/multi-stack/Setup.hs
                         tests/projects/multi-stack/app/Main.hs
                         tests/projects/multi-stack/cabal.project
                         tests/projects/multi-stack/hie.yaml
@@ -75,26 +47,20 @@
                         tests/projects/failing-cabal/failing-cabal.cabal
                         tests/projects/failing-cabal/hie.yaml
                         tests/projects/failing-cabal/MyLib.hs
-                        tests/projects/failing-cabal/Setup.hs
                         tests/projects/failing-stack/failing-stack.cabal
                         tests/projects/failing-stack/hie.yaml
                         tests/projects/failing-stack/src/Lib.hs
-                        tests/projects/failing-stack/Setup.hs
                         tests/projects/nested-cabal/nested-cabal.cabal
                         tests/projects/nested-cabal/cabal.project
                         tests/projects/nested-cabal/hie.yaml
                         tests/projects/nested-cabal/MyLib.hs
-                        tests/projects/nested-cabal/Setup.hs
                         tests/projects/nested-cabal/sub-comp/sub-comp.cabal
                         tests/projects/nested-cabal/sub-comp/Lib.hs
-                        tests/projects/nested-cabal/sub-comp/Setup.hs
                         tests/projects/nested-stack/nested-stack.cabal
                         tests/projects/nested-stack/hie.yaml
                         tests/projects/nested-stack/MyLib.hs
-                        tests/projects/nested-stack/Setup.hs
                         tests/projects/nested-stack/sub-comp/sub-comp.cabal
                         tests/projects/nested-stack/sub-comp/Lib.hs
-                        tests/projects/nested-stack/sub-comp/Setup.hs
                         tests/projects/simple-bios/A.hs
                         tests/projects/simple-bios/B.hs
                         tests/projects/simple-bios/hie-bios.sh
@@ -109,8 +75,6 @@
                         tests/projects/simple-bios-shell/hie.yaml
                         tests/projects/simple-cabal/A.hs
                         tests/projects/simple-cabal/B.hs
-                        tests/projects/simple-cabal/CHANGELOG.md
-                        tests/projects/simple-cabal/Setup.hs
                         tests/projects/simple-cabal/cabal.project
                         tests/projects/simple-cabal/hie.yaml
                         tests/projects/simple-cabal/simple-cabal.cabal
@@ -119,17 +83,13 @@
                         tests/projects/simple-direct/hie.yaml
                         tests/projects/simple-stack/A.hs
                         tests/projects/simple-stack/B.hs
-                        tests/projects/simple-stack/CHANGELOG.md
-                        tests/projects/simple-stack/Setup.hs
                         tests/projects/simple-stack/cabal.project
                         tests/projects/simple-stack/hie.yaml
                         tests/projects/simple-stack/simple-stack.cabal
                         "tests/projects/space stack/A.hs"
                         "tests/projects/space stack/B.hs"
-                        "tests/projects/space stack/Setup.hs"
                         "tests/projects/space stack/hie.yaml"
                         "tests/projects/space stack/stackproj.cabal"
-                        tests/projects/implicit-cabal/Setup.hs
                         tests/projects/implicit-cabal/cabal.project
                         tests/projects/implicit-cabal/implicit-cabal.cabal
                         tests/projects/implicit-cabal/Main.hs
@@ -141,23 +101,17 @@
                         tests/projects/implicit-cabal-deep-project/cabal.project
                         tests/projects/implicit-cabal-deep-project/foo/foo.cabal
                         tests/projects/implicit-cabal-deep-project/foo/Main.hs
-                        tests/projects/implicit-stack/Setup.hs
                         tests/projects/implicit-stack/implicit-stack.cabal
                         tests/projects/implicit-stack/Main.hs
-                        tests/projects/implicit-stack-multi/Setup.hs
                         tests/projects/implicit-stack-multi/implicit-stack-multi.cabal
                         tests/projects/implicit-stack-multi/Main.hs
-                        tests/projects/implicit-stack-multi/other-package/Setup.hs
                         tests/projects/implicit-stack-multi/other-package/other-package.cabal
                         tests/projects/implicit-stack-multi/other-package/Main.hs
-                        tests/projects/multi-stack-with-yaml/appA/Setup.hs
                         tests/projects/multi-stack-with-yaml/appA/appA.cabal
                         tests/projects/multi-stack-with-yaml/appA/src/Lib.hs
-                        tests/projects/multi-stack-with-yaml/appB/Setup.hs
                         tests/projects/multi-stack-with-yaml/appB/appB.cabal
                         tests/projects/multi-stack-with-yaml/appB/src/Lib.hs
                         tests/projects/multi-stack-with-yaml/hie.yaml
-                        tests/projects/stack-with-yaml/Setup.hs
                         tests/projects/stack-with-yaml/app/Main.hs
                         tests/projects/stack-with-yaml/hie.yaml
                         tests/projects/stack-with-yaml/stack-with-yaml.cabal
diff --git a/src/HIE/Bios/Cradle.hs b/src/HIE/Bios/Cradle.hs
--- a/src/HIE/Bios/Cradle.hs
+++ b/src/HIE/Bios/Cradle.hs
@@ -100,7 +100,11 @@
         (CradleConfig cradleDeps
           (Multi [(p, CradleConfig [] (Cabal $ dc <> c)) | (p, c) <- ms])
         , wdir)
-    Stack StackType{ stackComponent = mc, stackYaml = syaml} -> stackCradle wdir mc (fromMaybe "stack.yaml" syaml)
+    Stack StackType{ stackComponent = mc, stackYaml = syaml} ->
+      let
+        stackYamlConfig = stackYamlFromMaybe wdir syaml
+      in
+        stackCradle wdir mc stackYamlConfig
     StackMulti ds ms ->
       getCradle buildCustomCradle $
         (CradleConfig cradleDeps
@@ -552,9 +556,30 @@
   <|> findFileUpwards (\fp -> takeExtension fp == ".cabal") wdir
 
 ------------------------------------------------------------------------
+
+-- | Explicit data-type for stack.yaml configuration location.
+-- It is basically a 'Maybe' type, but helps to document the API
+-- and helps to avoid incorrect usage.
+data StackYaml
+  = NoExplicitYaml
+  | ExplicitYaml FilePath
+
+-- | Create an explicit StackYaml configuration from the
+stackYamlFromMaybe :: FilePath -> Maybe FilePath -> StackYaml
+stackYamlFromMaybe _wdir Nothing = NoExplicitYaml
+stackYamlFromMaybe wdir (Just fp) = ExplicitYaml (wdir </> fp)
+
+stackYamlProcessArgs :: StackYaml -> [String]
+stackYamlProcessArgs (ExplicitYaml yaml) = ["--stack-yaml", yaml]
+stackYamlProcessArgs NoExplicitYaml = []
+
+stackYamlLocationOrDefault :: StackYaml -> FilePath
+stackYamlLocationOrDefault NoExplicitYaml = "stack.yaml"
+stackYamlLocationOrDefault (ExplicitYaml yaml) = yaml
+
 -- | Stack Cradle
 -- Works for by invoking `stack repl` with a wrapper script
-stackCradle :: FilePath -> Maybe String -> FilePath -> Cradle a
+stackCradle :: FilePath -> Maybe String -> StackYaml -> Cradle a
 stackCradle wdir mc syaml =
   Cradle
     { cradleRootDir    = wdir
@@ -562,8 +587,9 @@
         { actionName = Types.Stack
         , runCradle = stackAction wdir mc syaml
         , runGhcCmd = \args ->
-            readProcessWithCwd
-              wdir "stack" (["--stack-yaml", syaml, "exec", "--silent", "ghc", "--"] <> args) ""
+            readProcessWithCwd wdir "stack"
+              (stackYamlProcessArgs syaml <> ["exec", "--silent", "ghc", "--"] <> args)
+              ""
         }
     }
 
@@ -576,25 +602,27 @@
 -- a '.cabal' file.
 --
 -- Found dependencies are relative to 'rootDir'.
-stackCradleDependencies :: FilePath -> FilePath -> FilePath -> IO [FilePath]
+stackCradleDependencies :: FilePath -> FilePath -> StackYaml -> IO [FilePath]
 stackCradleDependencies wdir componentDir syaml = do
   let relFp = makeRelative wdir componentDir
   cabalFiles' <- findCabalFiles componentDir
   let cabalFiles = map (relFp </>) cabalFiles'
-  return $ map normalise $ cabalFiles ++ [relFp </> "package.yaml", syaml]
+  return $ map normalise $
+    cabalFiles ++ [relFp </> "package.yaml", stackYamlLocationOrDefault syaml]
 
-stackAction :: FilePath -> Maybe String -> FilePath -> LoggingFunction -> FilePath -> IO (CradleLoadResult ComponentOptions)
+stackAction :: FilePath -> Maybe String -> StackYaml -> LoggingFunction -> FilePath -> IO (CradleLoadResult ComponentOptions)
 stackAction work_dir mc syaml l _fp = do
-  let ghcProcArgs = ("stack", ["--stack-yaml", syaml, "exec", "ghc", "--"])
+  let ghcProcArgs = ("stack", stackYamlProcessArgs syaml <> ["exec", "ghc", "--"])
   -- Same wrapper works as with cabal
   withCabalWrapperTool ghcProcArgs work_dir $ \wrapper_fp -> do
     (ex1, _stdo, stde, args) <-
       readProcessWithOutputFile l work_dir $
-        proc "stack" $ ["--stack-yaml", syaml, "repl", "--no-nix-pure", "--with-ghc", wrapper_fp]
-                       ++ [ comp | Just comp <- [mc] ]
+        stackProcess syaml
+                      $  ["repl", "--no-nix-pure", "--with-ghc", wrapper_fp]
+                      <> [ comp | Just comp <- [mc] ]
     (ex2, pkg_args, stdr, _) <-
       readProcessWithOutputFile l work_dir $
-        proc "stack" ["--stack-yaml", syaml, "path", "--ghc-package-path"]
+        stackProcess syaml ["path", "--ghc-package-path"]
     let split_pkgs = concatMap splitSearchPath pkg_args
         pkg_ghc_args = concatMap (\p -> ["-package-db", p] ) split_pkgs
     case processCabalWrapperArgs args of
@@ -617,6 +645,9 @@
                     , ghc_args ++ pkg_ghc_args
                     )
                     deps
+
+stackProcess :: StackYaml -> [String] -> CreateProcess
+stackProcess syaml args = proc "stack" $ stackYamlProcessArgs syaml <> args
 
 combineExitCodes :: [ExitCode] -> ExitCode
 combineExitCodes = foldr go ExitSuccess
diff --git a/src/HIE/Bios/Environment.hs b/src/HIE/Bios/Environment.hs
--- a/src/HIE/Bios/Environment.hs
+++ b/src/HIE/Bios/Environment.hs
@@ -58,7 +58,7 @@
 makeTargetsAbsolute wdir = map (\target -> target {G.targetId = makeTargetIdAbsolute wdir (G.targetId target)})
 
 makeTargetIdAbsolute :: FilePath -> G.TargetId -> G.TargetId
-makeTargetIdAbsolute wdir (G.TargetFile fp phase) = G.TargetFile (prependIfRelative wdir fp) phase
+makeTargetIdAbsolute wdir (G.TargetFile fp phase) = G.TargetFile (wdir </> fp) phase
 makeTargetIdAbsolute _ tid = tid
 
 ----------------------------------------------------------------
@@ -75,7 +75,7 @@
                     -> IO (CradleLoadResult FilePath)
 getRuntimeGhcLibDir cradle = do
   maybeNixLibDir <- lookupEnv "NIX_GHC_LIBDIR"
-  case maybeNixLibDir of 
+  case maybeNixLibDir of
     Just ld -> pure (CradleSuccess ld)
     Nothing -> fmap (fmap trim) $
       runGhcCmd (cradleOptsProg cradle) ["--print-libdir"]
@@ -198,22 +198,17 @@
 -- This makes the 'DynFlags' independent of the current working directory.
 makeDynFlagsAbsolute :: FilePath -> DynFlags -> DynFlags
 makeDynFlagsAbsolute work_dir df =
-  mapOverIncludePaths (prependIfRelative work_dir)
+  mapOverIncludePaths (work_dir </>)
   $ df
-    { importPaths = map (prependIfRelative work_dir) (importPaths df)
+    { importPaths = map (work_dir </>) (importPaths df)
     , packageDBFlags =
         let makePackageDbAbsolute (PackageDB pkgConfRef) = PackageDB
               $ case pkgConfRef of
-                PkgConfFile fp -> PkgConfFile (prependIfRelative work_dir fp)
+                PkgConfFile fp -> PkgConfFile (work_dir </> fp)
                 conf -> conf
             makePackageDbAbsolute db = db
         in map makePackageDbAbsolute (packageDBFlags df)
     }
-
-prependIfRelative :: FilePath -> FilePath -> FilePath
-prependIfRelative wdir f
-  | isAbsolute f = f
-  | otherwise = wdir </> f
 
 -- partition_args, along with some of the other code in this file,
 -- was copied from ghc/Main.hs
diff --git a/tests/projects/failing-cabal/Setup.hs b/tests/projects/failing-cabal/Setup.hs
deleted file mode 100644
--- a/tests/projects/failing-cabal/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/failing-stack/Setup.hs b/tests/projects/failing-stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/failing-stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/implicit-cabal/Setup.hs b/tests/projects/implicit-cabal/Setup.hs
deleted file mode 100644
--- a/tests/projects/implicit-cabal/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/implicit-stack-multi/Setup.hs b/tests/projects/implicit-stack-multi/Setup.hs
deleted file mode 100644
--- a/tests/projects/implicit-stack-multi/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/implicit-stack-multi/other-package/Setup.hs b/tests/projects/implicit-stack-multi/other-package/Setup.hs
deleted file mode 100644
--- a/tests/projects/implicit-stack-multi/other-package/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/implicit-stack-multi/other-package/other-package.cabal b/tests/projects/implicit-stack-multi/other-package/other-package.cabal
--- a/tests/projects/implicit-stack-multi/other-package/other-package.cabal
+++ b/tests/projects/implicit-stack-multi/other-package/other-package.cabal
@@ -15,7 +15,6 @@
 -- copyright:
 -- category:
 build-type:          Simple
-extra-source-files:  CHANGELOG.md
 
 executable other-package
   main-is:             Main.hs
diff --git a/tests/projects/implicit-stack/Setup.hs b/tests/projects/implicit-stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/implicit-stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/monorepo-cabal/A/Setup.hs b/tests/projects/monorepo-cabal/A/Setup.hs
deleted file mode 100644
--- a/tests/projects/monorepo-cabal/A/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/monorepo-cabal/B/Setup.hs b/tests/projects/monorepo-cabal/B/Setup.hs
deleted file mode 100644
--- a/tests/projects/monorepo-cabal/B/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/multi-cabal/Setup.hs b/tests/projects/multi-cabal/Setup.hs
deleted file mode 100644
--- a/tests/projects/multi-cabal/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/multi-stack-with-yaml/appA/Setup.hs b/tests/projects/multi-stack-with-yaml/appA/Setup.hs
deleted file mode 100644
--- a/tests/projects/multi-stack-with-yaml/appA/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/multi-stack-with-yaml/appB/Setup.hs b/tests/projects/multi-stack-with-yaml/appB/Setup.hs
deleted file mode 100644
--- a/tests/projects/multi-stack-with-yaml/appB/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/multi-stack/Setup.hs b/tests/projects/multi-stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/multi-stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/nested-cabal/Setup.hs b/tests/projects/nested-cabal/Setup.hs
deleted file mode 100644
--- a/tests/projects/nested-cabal/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/nested-cabal/sub-comp/Setup.hs b/tests/projects/nested-cabal/sub-comp/Setup.hs
deleted file mode 100644
--- a/tests/projects/nested-cabal/sub-comp/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/nested-stack/Setup.hs b/tests/projects/nested-stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/nested-stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/nested-stack/sub-comp/Setup.hs b/tests/projects/nested-stack/sub-comp/Setup.hs
deleted file mode 100644
--- a/tests/projects/nested-stack/sub-comp/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/simple-cabal/CHANGELOG.md b/tests/projects/simple-cabal/CHANGELOG.md
deleted file mode 100644
--- a/tests/projects/simple-cabal/CHANGELOG.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Revision history for simple-cabal
-
-## 0.1.0.0 -- YYYY-mm-dd
-
-* First version. Released on an unsuspecting world.
diff --git a/tests/projects/simple-cabal/Setup.hs b/tests/projects/simple-cabal/Setup.hs
deleted file mode 100644
--- a/tests/projects/simple-cabal/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/simple-cabal/simple-cabal.cabal b/tests/projects/simple-cabal/simple-cabal.cabal
--- a/tests/projects/simple-cabal/simple-cabal.cabal
+++ b/tests/projects/simple-cabal/simple-cabal.cabal
@@ -11,7 +11,6 @@
 -- copyright:
 -- category:
 build-type:          Simple
-extra-source-files:  CHANGELOG.md
 
 library
   exposed-modules: A B
diff --git a/tests/projects/simple-stack/CHANGELOG.md b/tests/projects/simple-stack/CHANGELOG.md
deleted file mode 100644
--- a/tests/projects/simple-stack/CHANGELOG.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# Revision history for simple-cabal
-
-## 0.1.0.0 -- YYYY-mm-dd
-
-* First version. Released on an unsuspecting world.
diff --git a/tests/projects/simple-stack/Setup.hs b/tests/projects/simple-stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/simple-stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/simple-stack/simple-stack.cabal b/tests/projects/simple-stack/simple-stack.cabal
--- a/tests/projects/simple-stack/simple-stack.cabal
+++ b/tests/projects/simple-stack/simple-stack.cabal
@@ -11,7 +11,6 @@
 -- copyright:
 -- category:
 build-type:          Simple
-extra-source-files:  CHANGELOG.md
 
 library
   exposed-modules: A B
diff --git a/tests/projects/space stack/Setup.hs b/tests/projects/space stack/Setup.hs
deleted file mode 100644
--- a/tests/projects/space stack/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain
diff --git a/tests/projects/stack-with-yaml/Setup.hs b/tests/projects/stack-with-yaml/Setup.hs
deleted file mode 100644
--- a/tests/projects/stack-with-yaml/Setup.hs
+++ /dev/null
@@ -1,2 +0,0 @@
-import Distribution.Simple
-main = defaultMain