diff --git a/src/Data/ProtoLens/Setup.hs b/src/Data/ProtoLens/Setup.hs
index e68f32b..f381199 100644
--- a/src/Data/ProtoLens/Setup.hs
+++ b/src/Data/ProtoLens/Setup.hs
@@ -41,9 +41,6 @@ import Distribution.PackageDescription
     , exeName
     , exposedModules
     , extraSrcFiles
-#if !MIN_VERSION_Cabal(2,0,0)
-    , hsSourceDirs
-#endif
 #if MIN_VERSION_Cabal(2,4,0)
     , specVersion
 #endif
@@ -53,7 +50,7 @@ import Distribution.PackageDescription
     , testBuildInfo
     , testName
     )
-import qualified Distribution.Simple.BuildPaths as BuildPaths
+import Distribution.Simple.BuildPaths (autogenComponentModulesDir)
 import Distribution.Simple.InstallDirs (datadir)
 import Distribution.Simple.LocalBuildInfo
     ( LocalBuildInfo(..)
@@ -61,9 +58,10 @@ import Distribution.Simple.LocalBuildInfo
     , ComponentName(..)
     , ComponentLocalBuildInfo
     , componentPackageDeps
-#if MIN_VERSION_Cabal(2,0,0)
     , allComponentsInBuildOrder
     , componentNameMap
+#if MIN_VERSION_Cabal(3,0,0)
+    , LibraryName(..)
 #endif
     )
 import qualified Distribution.Simple.PackageIndex as PackageIndex
@@ -205,16 +203,6 @@ generatingSpecificProtos root getProtos hooks = hooks
     { buildHook = \p l h f -> generate l >> buildHook hooks p l h f
     , haddockHook = \p l h f -> generate l >> haddockHook hooks p l h f
     , replHook = \p l h f args -> generate l >> replHook hooks p l h f args
-#if !MIN_VERSION_Cabal(2,0,0)
-    -- Older versions of Cabal don't support the autogen-modules field.
-    -- Work around it by manually generating the modules and putting them
-    -- in a place where `cabal sdist` will pick them up.
-    , sDistHook = \p maybe_l h f -> case maybe_l of
-            Nothing -> error "Can't run protoc; run 'cabal configure' first."
-            Just l -> do
-                        generate l
-                        sDistHook hooks (fudgePackageDesc l p) maybe_l h f
-#endif
     , postCopy = \a flags pkg lbi -> do
                   let verb = fromFlag $ copyVerbosity flags
                   let destDir = datadir (absoluteInstallDirs pkg lbi
@@ -316,39 +304,6 @@ copyProtosToDataDir verb root destDir files = do
 protoLensImportsPrefix :: FilePath
 protoLensImportsPrefix = "proto-lens-imports"
 
-#if !MIN_VERSION_Cabal(2,0,0)
--- | Add the autogen directory to the hs-source-dirs of all the targets in the
--- .cabal file.  Used to fool 'sdist' by pointing it to the generated source
--- files.
-fudgePackageDesc :: LocalBuildInfo -> PackageDescription -> PackageDescription
-fudgePackageDesc lbi p = p
-    { library =
-        (\lib -> lib { libBuildInfo = fudgeBuildInfo CLibName $ libBuildInfo lib })
-            <$> library p
-    , executables =
-        (\exe -> exe { buildInfo = fudgeBuildInfo (CExeName $ exeName exe)
-                                        $ buildInfo exe })
-            <$> executables p
-    , testSuites =
-        (\test -> test { testBuildInfo = fudgeBuildInfo (CTestName $ testName test)
-                                            $ testBuildInfo test })
-            <$> testSuites p
-    , benchmarks =
-        (\bench -> bench { benchmarkBuildInfo =
-                              fudgeBuildInfo (CBenchName $ benchmarkName bench)
-                                  $ benchmarkBuildInfo bench })
-            <$> benchmarks p
-    }
-  where
-    comps = allComponents lbi
-    fudgeBuildInfo n bi
-        | Just compLBI <- Map.lookup n comps
-            = bi { hsSourceDirs = autogenComponentModulesDir lbi compLBI
-                                    : hsSourceDirs bi }
-        | otherwise = bi -- Could happen if a component isn't active; try
-                         -- anyway and see whether Cabal complains later on.
-#endif
-
 -- | Returns whether the @root@ is a parent folder of @f@.
 isSubdirectoryOf :: FilePath -> FilePath -> Bool
 isSubdirectoryOf root f
@@ -423,15 +378,18 @@ collectActiveModules
 collectActiveModules l = map (\(n, c) -> (c, f n)) $ Map.toList $ allComponents l
   where
     p = localPkgDescr l
-    f CLibName = maybeToList (library p) >>=
+#if MIN_VERSION_Cabal(3,0,0)
+    f (CLibName LMainLibName)
+#else
+    f CLibName
+#endif
+        = maybeToList (library p) >>=
                     \lib -> exposedModules lib
                                 ++ otherModules (libBuildInfo lib)
     f (CExeName n) = otherModules . buildInfo $ exes Map.! n
     f (CTestName n) = otherModules . testBuildInfo $ tests Map.! n
     f (CBenchName n) = otherModules . benchmarkBuildInfo $ benchs Map.! n
-#if MIN_VERSION_Cabal(2,0,0)
     f _ = []  -- TODO: other lib kinds; for now just suppress the warning
-#endif
     exes = Map.fromList [(exeName e, e) | e <- executables p]
     tests = Map.fromList [(testName e, e) | e <- testSuites p]
     benchs = Map.fromList [(benchmarkName e, e) | e <- benchmarks p]
@@ -441,22 +399,14 @@ collectActiveModules l = map (\(n, c) -> (c, f n)) $ Map.toList $ allComponents
 
 -- | List all the packages that this one depends on.
 collectDeps :: LocalBuildInfo -> [InstalledPackageInfo.InstalledPackageInfo]
-#if MIN_VERSION_Cabal(2,0,0)
 collectDeps l = do
     c <- allComponentsInBuildOrder l
     (i,_) <- componentPackageDeps c
     Just p <- [PackageIndex.lookupUnitId (installedPkgs l) i]
     return p
-#else
-collectDeps l = do
-    (_, c ,_) <- componentsConfigs l
-    (_, i) <- componentPackageDeps c
-    PackageIndex.lookupSourcePackageId (installedPkgs l) i
-#endif
 
 -- | All the components that will be built by this Cabal command.
 allComponents :: LocalBuildInfo -> Map.Map ComponentName ComponentLocalBuildInfo
-#if MIN_VERSION_Cabal(2,0,0)
 allComponents l = fmap requireOne $ componentNameMap l
   where
     -- TODO: this doesn't support Backpack, which can have more than one
@@ -464,16 +414,3 @@ allComponents l = fmap requireOne $ componentNameMap l
     requireOne [x] = x
     requireOne xs = error $ "Data.ProtoLens.Setup.allComponents: expected one "
                           ++ "component per name, got " ++ show xs
-
-#else
-allComponents l = Map.fromList [(c, b) | (c, b, _) <- componentsConfigs l]
-#endif
-
--- | Get the component-level "autogen" directory where we're putting the
--- generated .hs files.  (For Cabal-1.0, use the shared 'BuildPaths.autogenModulesDir'.)
-autogenComponentModulesDir :: LocalBuildInfo -> ComponentLocalBuildInfo -> FilePath
-#if MIN_VERSION_Cabal(2,0,0)
-autogenComponentModulesDir = BuildPaths.autogenComponentModulesDir
-#else
-autogenComponentModulesDir lbi _ = BuildPaths.autogenModulesDir lbi
-#endif