diff --git a/shake-ext.cabal b/shake-ext.cabal
--- a/shake-ext.cabal
+++ b/shake-ext.cabal
@@ -1,7 +1,7 @@
 name:                shake-ext
-version:             1.5.0.0
+version:             2.0.0.0
 synopsis:            Helper functions for linting with shake 
-description:         This package provides several linters out of the box, as well as functionality for building ATS source files with [shake](http://shakebuild.com/).
+description:         This package provides several linters out of the box, for use with [shake](http://shakebuild.com/).
 homepage:            https://hub.darcs.net/vmchale/shake-ext
 license:             BSD3
 license-file:        LICENSE
@@ -26,6 +26,7 @@
                      , Development.Shake.Man
                      , Development.Shake.Check
                      , Development.Shake.Clean
+                     , Development.Shake.Cabal
   build-depends:       base >= 4.10 && < 5
                      , shake
                      , language-ats >= 0.1.1.3
@@ -33,6 +34,7 @@
                      , composition-prelude
                      , directory
                      , text
+                     , Cabal >= 2.0
   default-language:    Haskell2010
   if flag(development)
     ghc-options:       -Werror
diff --git a/src/Development/Shake/Cabal.hs b/src/Development/Shake/Cabal.hs
new file mode 100644
--- /dev/null
+++ b/src/Development/Shake/Cabal.hs
@@ -0,0 +1,36 @@
+module Development.Shake.Cabal ( getCabalDeps
+                               ) where
+
+import           Control.Arrow
+import           Control.Monad
+import           Data.Foldable                         (toList)
+import           Data.Maybe                            (catMaybes)
+import           Data.Semigroup
+import           Distribution.ModuleName
+import           Distribution.PackageDescription
+import           Distribution.PackageDescription.Parse
+import           Distribution.Types.CondTree
+import           Distribution.Verbosity
+
+libraryToFiles :: Library -> [FilePath]
+libraryToFiles lib = cs <> is <> (toFilePath <$> explicitLibModules lib)
+    where (cs, is) = (cSources &&& includes) $ libBuildInfo lib
+
+extract :: CondTree a b Library -> [Library]
+extract (CondNode d _ []) = [d]
+extract (CondNode d _ bs) = d : (g =<< bs)
+    where g (CondBranch _ tb fb) = join $ catMaybes [Just $ extract tb, extract <$> fb]
+
+-- | Get library dependencies from a @.cabal@ file.
+getCabalDeps :: FilePath -> IO [FilePath]
+getCabalDeps = getCabalDepsV normal
+
+-- | Same as above, but we set the 'Verbosity' to be used during parsing.
+getCabalDepsV :: Verbosity -> FilePath -> IO [FilePath]
+getCabalDepsV v p = do
+    contents <- readFile p
+    pkg <- readGenericPackageDescription v contents
+    let extraSrc = extraSrcFiles $ packageDescription pkg
+        libs = toList (condLibrary pkg)
+        normalSrc = (libraryToFiles <=< extract) =<< libs
+    pure (extraSrc <> normalSrc)
diff --git a/src/Development/Shake/Linters.hs b/src/Development/Shake/Linters.hs
--- a/src/Development/Shake/Linters.hs
+++ b/src/Development/Shake/Linters.hs
@@ -21,6 +21,8 @@
 dhall :: Action ()
 dhall = mapM_ checkDhall =<< getDhall
 
+-- TODO @cabal format@.
+
 checkDhall :: FilePath -> Action ()
 checkDhall dh = do
     contents <- liftIO $ readFile dh