diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # cdeps
 
+## 0.1.2.4
+
+  * No nested comments since C doesn't have them
+
 ## 0.1.2.3
 
   * Set `cross` flag to temporarily enable cross-compilation. This will be
diff --git a/cdeps.cabal b/cdeps.cabal
--- a/cdeps.cabal
+++ b/cdeps.cabal
@@ -1,44 +1,43 @@
-cabal-version: 1.18
-name: cdeps
-version: 0.1.2.3
-license: BSD3
-license-file: LICENSE
-copyright: Copyright: (c) 2018 Vanessa McHale
-maintainer: vamchale@gmail.com
-author: Vanessa McHale
-synopsis: Extract dependencies from C code.
+cabal-version:   1.18
+name:            cdeps
+version:         0.1.2.4
+license:         BSD3
+license-file:    LICENSE
+copyright:       Copyright: (c) 2018 Vanessa McHale
+maintainer:      vamchale@gmail.com
+author:          Vanessa McHale
+synopsis:        Extract dependencies from C code.
 description:
     This package provides the ability to extract dependencies from C code, for use with [shake](https://shakebuild.com) or otherwise. This can also be used to extract dependencies from Haskell source using the C preprocessor.
-category: Development, C, Language
-build-type: Simple
-extra-doc-files: README.md
-                 CHANGELOG.md
 
+category:        Development, C, Language
+build-type:      Simple
+extra-doc-files:
+    README.md
+    CHANGELOG.md
+
 source-repository head
-    type: darcs
+    type:     darcs
     location: https://hub.darcs.net/vamchale/cdeps
 
 flag cross
-    description:
-        Set this flag when cross-compiling
-    default: False
-    manual: True
+    description: Set this flag when cross-compiling
+    default:     False
+    manual:      True
 
 flag development
-    description:
-        Enable `-Werror`
-    default: False
-    manual: True
+    description: Enable `-Werror`
+    default:     False
+    manual:      True
 
 library
-    exposed-modules:
-        Language.C.Dependency
-    hs-source-dirs: src
+    exposed-modules:  Language.C.Dependency
+    hs-source-dirs:   src
     default-language: Haskell2010
     other-extensions: OverloadedStrings
-    ghc-options: -Wall
+    ghc-options:      -Wall
     build-depends:
-        base >=4.8 && <5,
+        base >=4.9 && <5,
         text -any,
         bytestring -any,
         array -any,
@@ -51,11 +50,6 @@
     if (flag(development) && impl(ghc <8.4))
         ghc-options: -Werror
 
-    if !impl(ghc >=8.0)
-        build-depends:
-            transformers -any,
-            semigroups -any
-
     if impl(ghc >=8.0)
         ghc-options: -Wincomplete-uni-patterns -Wincomplete-record-updates
 
@@ -63,21 +57,16 @@
         ghc-options: -Wmissing-export-lists
 
 executable cdeps
-    main-is: Main.hs
-    hs-source-dirs: app
-    other-modules:
-        Paths_cdeps
+    main-is:          Main.hs
+    hs-source-dirs:   app
+    other-modules:    Paths_cdeps
     default-language: Haskell2010
-    ghc-options: -Wall
+    ghc-options:      -Wall
     build-depends:
-        base >=4.8 && <5,
+        base >=4.9 && <5,
         cdeps -any,
         optparse-applicative -any
 
-    if !impl(ghc >=8.0)
-        build-depends:
-            semigroups -any
-
     if (flag(development) && impl(ghc <8.4))
         ghc-options: -Werror
 
@@ -88,11 +77,11 @@
         ghc-options: -Wmissing-export-lists
 
 test-suite cdeps-test
-    type: exitcode-stdio-1.0
-    main-is: Spec.hs
-    hs-source-dirs: test
+    type:             exitcode-stdio-1.0
+    main-is:          Spec.hs
+    hs-source-dirs:   test
     default-language: Haskell2010
-    ghc-options: -threaded -rtsopts -with-rtsopts=-N -Wall
+    ghc-options:      -threaded -rtsopts -with-rtsopts=-N -Wall
     build-depends:
         base -any,
         cdeps -any,
diff --git a/src/Language/C/Dependency.x b/src/Language/C/Dependency.x
--- a/src/Language/C/Dependency.x
+++ b/src/Language/C/Dependency.x
@@ -30,12 +30,15 @@
 
 @include = "#include" | "#include" $white+ \\\n
 
+@comment_inner_char = ([^\*] | \* [^\/])
+
 tokens :-
 
     $white+                      ;
     "//".*                       ;
 
-    "/*"                         { \_ _ -> nested_comment }
+    -- FIXME: no nested comments in C
+    "/*" @comment_inner_char* "*/" ;
 
     @include                     { \_ _ -> alex Include }
     @string                      { tok (\_ s -> alex (StringTok (TL.unpack (decodeUtf8 s)))) }
@@ -62,34 +65,6 @@
 
 getIncludesText :: TL.Text -> Either String [FilePath]
 getIncludesText = getIncludes . encodeUtf8
-
--- TODO file name??
-nested_comment :: Alex Token
-nested_comment = go 1 =<< alexGetInput
-
-    where go :: Int -> AlexInput -> Alex Token
-          go 0 input = alexSetInput input *> alexMonadScan
-          go n input =
-            case alexGetByte input of
-                Nothing -> err input
-                Just (c, input') ->
-                    case c of
-                        42 ->
-                            case alexGetByte input' of
-                                Nothing -> err input'
-                                Just (47,input_) -> go (n-1) input_
-                                Just (_,input_) -> go n input_
-                        47 ->
-                            case alexGetByte input' of
-                                Nothing -> err input'
-                                Just (c',input_) -> go (addLevel c' $ n) input_
-                        _ -> go n input'
-
-          addLevel c' = if c' == 42 then (+1) else id
-
-          err (pos,_,_,_) =
-            let (AlexPn _ line col) = pos in
-                alexError ("Error in nested comment at line " ++ show line ++ ", column " ++ show col)
 
 extractDeps :: [Token] -> [FilePath]
 extractDeps [] = []
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -6,7 +6,9 @@
 main :: IO ()
 main = hspec $ parallel $
     describe "byteStringIncludes" $ do
-        it "should work (1/2)" $
+        it "should work (1/3)" $
             getIncludes "#include \"header.h\"" `shouldBe` Right ["header.h"]
-        it "should work (2/2)" $
+        it "should work (2/3)" $
             getIncludes "#include \\\n\"gmp.cats\"" `shouldBe` Right ["gmp.cats"]
+        it "should work (3/3)" $
+            getIncludes "/* block commend /* */\n#include \\\n\"gmp.cats\"" `shouldBe` Right ["gmp.cats"]