diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,17 @@
 
 `simple-cabal` uses [PVP Versioning](https://pvp.haskell.org)
 
-## 0.0.0.1
+## 0.1.0 (2019-09-30)
+- add buildDependencies, setupDependencies, testsuiteDependencies
+  (from cabal-rpm), and tryFindPackageDesc
+- more deps compatibility: showVersion, depPkgName, exeDepName, pkgcfgDepName
+- export PackageName, mkPackageName, unPackageName,
+  allBuildInfo, BuildInfo, FlagName & mkFlagName, licenseFiles
+- no longer export: normal
+- support Cabal-3 (ghc-8.8.1)
+
+## 0.0.0.1 (2019-07-09)
 - allow building with Cabal 1!
 
-## 0.0.0
+## 0.0.0 (2019-06-08)
 - Initially version, mostly taken from cabal-rpm PackageUtils.hs
diff --git a/SimpleCabal.hs b/SimpleCabal.hs
new file mode 100644
--- /dev/null
+++ b/SimpleCabal.hs
@@ -0,0 +1,342 @@
+{-# LANGUAGE CPP #-}
+
+module SimpleCabal (
+  findCabalFile,
+  finalPackageDescription,
+  getPackageId,
+--  dependencies,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,4,0)
+  buildDepends,
+#endif
+  buildDependencies,
+  setupDependencies,
+  testsuiteDependencies,
+
+  allBuildInfo,
+  BuildInfo (..),
+  depPkgName, exeDepName, pkgcfgDepName,
+  FlagName, mkFlagName,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,20,0)
+#else
+  licenseFiles,
+#endif
+  PackageDescription (..),
+  PackageIdentifier (..),
+  PackageName, mkPackageName, unPackageName,
+  packageName, packageVersion,
+  readGenericPackageDescription,
+  showPkgId,
+  showVersion,
+  tryFindPackageDesc
+  ) where
+
+#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,8,0))
+#else
+import Control.Applicative ((<$>))
+#endif
+
+import Data.List (delete, nub)
+
+import Distribution.Compiler
+import Distribution.Package  (
+                              packageName,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+                              depPkgName,
+                              mkPackageName,
+                              unPackageName,
+                              unPkgconfigName,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,4,0)
+                              Dependency,
+#endif
+#else
+#endif
+#endif
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+                              Dependency (..),
+#endif
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+                              PackageName,
+#else
+                              PackageName (..),
+#endif
+                              PackageIdentifier (..),
+                                       )
+
+import Distribution.PackageDescription (
+  PackageDescription (..),
+  allBuildInfo,
+  BuildInfo (..),
+--  buildToolDepends,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,4,0)
+  enabledBuildDepends,
+#endif
+  extraLibs,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+  FlagName, 
+  mkFlagName,
+#else
+  FlagName (..),
+#endif
+  GenericPackageDescription(packageDescription),
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+  mkFlagAssignment,
+#endif
+  pkgconfigDepends,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,24,0)
+  setupDepends,
+#endif
+  targetBuildDepends,
+  TestSuite (..)
+  )
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+import Distribution.PackageDescription.Configuration (finalizePD)
+import Distribution.Types.ComponentRequestedSpec (defaultComponentRequestedSpec)
+import Distribution.Types.LegacyExeDependency (LegacyExeDependency (..))
+import Distribution.Types.PkgconfigDependency (PkgconfigDependency (..))
+#else
+import Distribution.PackageDescription.Configuration (finalizePackageDescription)
+#endif
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+import Distribution.PackageDescription.Parsec (readGenericPackageDescription)
+#elif defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+import Distribution.PackageDescription.Parse (readGenericPackageDescription)
+#else
+import Distribution.PackageDescription.Parse (readPackageDescription)
+#endif
+
+import Distribution.Simple.Compiler (
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
+    compilerInfo
+#else
+    Compiler (..)
+#endif
+    )
+import Distribution.Simple.Configure (
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,18,0)
+    configCompilerEx
+#else
+    configCompiler
+#endif
+    )
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+--import Distribution.Simple.BuildToolDepends (getAllToolDependencies)
+import Distribution.Simple.Program   (defaultProgramDb)
+#else
+import Distribution.Simple.Program   (defaultProgramConfiguration)
+#endif
+import Distribution.Simple.Utils (
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,20,0)
+    tryFindPackageDesc
+#else
+    findPackageDesc
+#endif
+    )
+
+import Distribution.System (Platform (..), buildArch, buildOS)
+
+import Distribution.Verbosity (normal,
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+                               Verbosity
+#endif
+                              )
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+import Distribution.Pretty (prettyShow)
+#else
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+import Distribution.Version (showVersion)
+#else
+import Data.Version (showVersion)
+#endif
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+import qualified Distribution.Version (Version)
+#endif
+
+import System.Directory (getDirectoryContents)
+import System.FilePath (takeExtension)
+
+-- | Find the .cabal file in the current directory.
+--
+-- Errors if more than one or no file found.
+--
+-- since @0.0.0.1@
+findCabalFile :: IO FilePath
+findCabalFile = do
+  allCabals <- filesWithExtension "." ".cabal"
+  case allCabals of
+    [file] -> return file
+    [] -> error "No .cabal file found"
+    _ -> error "More than one .cabal file found!"
+  where
+    filesWithExtension :: FilePath -> String -> IO [FilePath]
+    filesWithExtension dir ext =
+      filter (\ f -> takeExtension f == ext && head f /= '.')
+      <$> getDirectoryContents dir
+
+-- | Get the package name-version from the .cabal file in the current directory.
+--
+-- since @0.0.0.1@
+getPackageId :: IO PackageIdentifier
+getPackageId = do
+  gpd <- findCabalFile >>= readGenericPackageDescription normal
+  return $ package $ packageDescription gpd
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+readGenericPackageDescription :: Verbosity
+                              -> FilePath -> IO GenericPackageDescription
+readGenericPackageDescription = readPackageDescription
+#endif
+
+-- | Generate PackageDescription from the specified .cabal file and flags.
+--
+-- since @0.0.0.1@
+finalPackageDescription :: [(FlagName, Bool)] -> FilePath
+                          -> IO PackageDescription
+finalPackageDescription flags cabalfile = do
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+  let defaultProgramDb = defaultProgramConfiguration
+#endif
+  genPkgDesc <- readGenericPackageDescription normal cabalfile
+  compiler <- do
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,18,0)
+                              (compiler, _, _) <- configCompilerEx
+#else
+                              (compiler, _) <- configCompiler
+#endif
+                                (Just GHC) Nothing Nothing defaultProgramDb normal
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
+                              return (compilerInfo compiler)
+#else
+                              return (compilerId compiler)
+#endif
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+#else
+  let mkFlagAssignment = id
+#endif
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+  let finalizePackageDescription flags' = finalizePD flags' defaultComponentRequestedSpec
+#endif
+  let final =
+        finalizePackageDescription (mkFlagAssignment flags)
+        (const True) (Platform buildArch buildOS)
+        compiler
+        [] genPkgDesc
+  case final of
+    Left e -> error $ "finalize failed: " ++ show e
+    Right res -> return $ fst res
+
+-- | Return the list of build dependencies of a package, excluding itself
+buildDependencies :: PackageDescription -> [PackageName]
+buildDependencies pkgDesc =
+  let deps = nub $ map depPkgName (buildDepends pkgDesc)
+      self = pkgName $ package pkgDesc
+  in delete self deps
+
+-- | Return the list of testsuite dependencies of a package, excluding itself
+testsuiteDependencies :: PackageDescription -> [PackageName]
+testsuiteDependencies pkgDesc =
+  let self = pkgName $ package pkgDesc in
+  delete self . nub . map depPkgName $ concatMap (targetBuildDepends . testBuildInfo) (testSuites pkgDesc)
+
+packageVersion :: PackageIdentifier -> String
+packageVersion =
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+  prettyShow . pkgVersion
+#else
+  showVersion . pkgVersion
+#endif
+
+showPkgId :: PackageIdentifier -> String
+showPkgId pkgid =
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+  prettyShow pkgid
+#else
+  unPackageName (packageName pkgid) ++ "-" ++ packageVersion pkgid
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
+#else
+unPackageName :: PackageName -> String
+unPackageName (PackageName n) = n
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
+showVersion :: Distribution.Version.Version -> String
+showVersion = prettyShow
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+mkFlagName :: String -> FlagName
+mkFlagName = FlagName
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,20,0)
+#else
+tryFindPackageDesc :: FilePath -> IO FilePath
+tryFindPackageDesc = findPackageDesc
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,20,0)
+#else
+licenseFiles :: PackageDescription -> [FilePath]
+licenseFiles pkgDesc =
+  [licenseFile pkgDesc | licenseFile pkgDesc /= ""]
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,4,0)
+buildDepends :: PackageDescription -> [Dependency]
+buildDepends = flip enabledBuildDepends defaultComponentRequestedSpec
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+exeDepName :: LegacyExeDependency -> String
+exeDepName (LegacyExeDependency n _) = n
+
+pkgcfgDepName :: PkgconfigDependency -> String
+pkgcfgDepName (PkgconfigDependency n _) = unPkgconfigName n
+#else
+depPkgName :: Dependency -> PackageName
+depPkgName (Dependency pn _) = pn
+
+exeDepName :: Dependency -> String
+exeDepName = unPackageName . depPkgName
+
+pkgcfgDepName :: Dependency -> String
+pkgcfgDepName = unPackageName . depPkgName
+#endif
+
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
+#else
+mkPackageName :: String -> PackageName
+mkPackageName = PackageName
+#endif
+
+setupDependencies :: PackageDescription  -- ^pkg description
+                  -> [PackageName]         -- ^depends
+#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,24,0)
+setupDependencies pkgDesc =
+  maybe [] (map depPkgName . setupDepends) (setupBuildInfo pkgDesc)
+#else
+setupDependencies _pkgDesc = []
+#endif
+
+-- dependencies :: PackageDescription  -- ^pkg description
+--                 -> ([PackageName], [PackageName], [ExeDependency], [String], [PkgconfigDependency])
+--                 -- ^depends, setup, tools, c-libs, pkgcfg
+-- dependencies pkgDesc =
+--     let --self = pkgName $ package pkgDesc
+--         deps = buildDependencies pkgDesc
+--         setup = setupDependencies pkgDesc
+--         buildinfo = allBuildInfo pkgDesc
+--         tools =  nub $ concatMap buildToolDepends buildinfo
+--         clibs = nub $ concatMap extraLibs buildinfo
+--         pkgcfgs = nub $ concatMap pkgconfigDepends buildinfo
+--     in (deps, setup, tools, clibs, pkgcfgs)
diff --git a/simple-cabal.cabal b/simple-cabal.cabal
--- a/simple-cabal.cabal
+++ b/simple-cabal.cabal
@@ -1,9 +1,9 @@
 cabal-version:       >= 1.10
 name:                simple-cabal
-version:             0.0.0.1
+version:             0.1.0
 synopsis:            Cabal file wrapper library
-description:         Cabal compatibility layer for reading and
-                     parsing .cabal files
+description:         Find and read .cabal files, and
+                     a Cabal dependency compatibility layer.
 homepage:            https://github.com/juhp/simple-cabal
 bug-reports:         https://github.com/juhp/simple-cabal/issues
 license:             BSD3
@@ -15,16 +15,15 @@
 build-type:          Simple
 extra-source-files:  README.md
                    , CHANGELOG.md
-tested-with:         GHC == 8.6.5, GHC == 8.4.4, GHC == 8.2.2, GHC == 8.0.2,
-                     GHC == 7.10.3, GHC == 7.8.4, GHC == 7.6.3, GHC == 7.4.2,
-                     GHC == 7.0.4
+tested-with:         GHC == 8.8.1, GHC == 8.6.5, GHC == 8.4.4, GHC == 8.2.2,
+                     GHC == 8.0.2, GHC == 7.10.3, GHC == 7.8.4, GHC == 7.6.3,
+                     GHC == 7.4.2, GHC == 7.0.4
 
 source-repository head
   type:                git
   location:            https://github.com/juhp/simple-cabal.git
 
 library
-  hs-source-dirs:      src
   exposed-modules:     SimpleCabal
                        
 
diff --git a/src/SimpleCabal.hs b/src/SimpleCabal.hs
deleted file mode 100644
--- a/src/SimpleCabal.hs
+++ /dev/null
@@ -1,189 +0,0 @@
-{-# LANGUAGE CPP #-}
-
-module SimpleCabal
-       ( findCabalFile
-       , finalPackageDescription
-       , getPackageId
-       , normal
-       , PackageDescription (..)
-       , PackageIdentifier (..)
-       , packageName, packageVersion
-       , readGenericPackageDescription
-       , showPkgId
-       ) where
-
-#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,8,0))
-#else
-import Control.Applicative ((<$>))
-#endif
-
-import Distribution.Compiler
-import Distribution.Package  (PackageIdentifier (..),
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
-                                        unPackageName
-#else
-                                        PackageName (..)
-#endif
-                                       )
-import Distribution.PackageDescription 
-  (PackageDescription (..),
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-  FlagName, 
-#else
-  FlagName (..),
-#endif
-  GenericPackageDescription(packageDescription),
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
-  mkFlagAssignment
-#endif
-  )
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-import Distribution.PackageDescription.Configuration (finalizePD)
-import Distribution.Types.ComponentRequestedSpec (defaultComponentRequestedSpec)
-#else
-import Distribution.PackageDescription.Configuration (finalizePackageDescription)
-#endif
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
-import Distribution.PackageDescription.Parsec (readGenericPackageDescription)
-#elif defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-import Distribution.PackageDescription.Parse (readGenericPackageDescription)
-#else
-import Distribution.PackageDescription.Parse (readPackageDescription)
-#endif
-
-import Distribution.Simple.Compiler (
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
-    compilerInfo
-#else
-    Compiler (..)
-#endif
-    )
-import Distribution.Simple.Configure (
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,18,0)
-    configCompilerEx
-#else
-    configCompiler
-#endif
-    )
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-import Distribution.Simple.Program   (defaultProgramDb)
-#else
-import Distribution.Simple.Program   (defaultProgramConfiguration)
-#endif
-import Distribution.System (Platform (..), buildArch, buildOS)
-import Distribution.Verbosity (normal,
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-#else
-                               Verbosity
-#endif
-                              )
-
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
-import Distribution.Pretty (prettyShow)
-#else
-import qualified Distribution.Version (showVersion, Version)
-#endif
-#else
-import qualified Data.Version (
-    showVersion,
-#if (defined(MIN_VERSION_base) && MIN_VERSION_base(4,8,0))
-    Version,
-#else
-    Version(..)
-#endif
-  )
-#endif
-
-import System.Directory (getDirectoryContents)
-import System.FilePath (takeExtension)
-
-type Flags = [(FlagName, Bool)]
-
-findCabalFile :: IO FilePath
-findCabalFile = do
-  allCabals <- filesWithExtension "." ".cabal"
-  case allCabals of
-    [file] -> return file
-    [] -> error "No .cabal file found"
-    _ -> error "More than one .cabal file found!"
-  where
-    filesWithExtension :: FilePath -> String -> IO [FilePath]
-    filesWithExtension dir ext =
-      filter (\ f -> takeExtension f == ext) <$> getDirectoryContents dir
-
-getPackageId :: IO PackageIdentifier
-getPackageId = do
-  gpd <- findCabalFile >>= readGenericPackageDescription normal
-  return $ package $ packageDescription gpd
-
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-#else
-readGenericPackageDescription :: Distribution.Verbosity.Verbosity
-                              -> FilePath -> IO GenericPackageDescription
-readGenericPackageDescription = readPackageDescription
-#endif
-
-finalPackageDescription :: Flags -> FilePath
-                          -> IO PackageDescription
-finalPackageDescription flags cabalfile = do
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-#else
-  let defaultProgramDb = defaultProgramConfiguration
-#endif
-  genPkgDesc <- readGenericPackageDescription normal cabalfile
-  compiler <- do
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,18,0)
-                              (compiler, _, _) <- configCompilerEx
-#else
-                              (compiler, _) <- configCompiler
-#endif
-                                (Just GHC) Nothing Nothing defaultProgramDb normal
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
-                              return (compilerInfo compiler)
-#else
-                              return (compilerId compiler)
-#endif
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
-#else
-  let mkFlagAssignment = id
-#endif
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-  let finalizePackageDescription flags' = finalizePD flags' defaultComponentRequestedSpec
-#endif
-  let final =
-        finalizePackageDescription (mkFlagAssignment flags)
-        (const True) (Platform buildArch buildOS)
-        compiler
-        [] genPkgDesc
-  case final of
-    Left e -> error $ "finalize failed: " ++ show e
-    Right res -> return $ fst res
-
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(1,22,0)
-#else
-unPackageName :: PackageName -> String
-unPackageName (PackageName n) = n
-#endif
-
-packageName :: PackageIdentifier -> String
-packageName = unPackageName . pkgName
-
-packageVersion :: PackageIdentifier -> String
-packageVersion = prettyShow . pkgVersion
-
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,2,0)
-#else
-#if defined(MIN_VERSION_Cabal) && MIN_VERSION_Cabal(2,0,0)
-prettyShow :: Distribution.Version.Version -> String
-prettyShow = Distribution.Version.showVersion
-#else
-prettyShow :: Data.Version.Version -> String
-prettyShow = Data.Version.showVersion
-#endif
-#endif
-
-showPkgId :: PackageIdentifier -> String
-showPkgId pkgid =
-  packageName pkgid ++ "-" ++ packageVersion pkgid
-