diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for tree-diff
 
+## 0.0.0.1
+
+- Move to `build-type: Simple`
+
 ## 0
 
-* First version. Released on an unsuspecting world.
+- First version. Released on an unsuspecting world.
diff --git a/Setup.hs b/Setup.hs
--- a/Setup.hs
+++ b/Setup.hs
@@ -1,33 +1,2 @@
-{-# LANGUAGE CPP #-}
-{-# OPTIONS_GHC -Wall #-}
-module Main (main) where
-
-#ifndef MIN_VERSION_cabal_doctest
-#define MIN_VERSION_cabal_doctest(x,y,z) 0
-#endif
-
-#if MIN_VERSION_cabal_doctest(1,0,0)
-
-import Distribution.Extra.Doctest ( defaultMainWithDoctests )
-main :: IO ()
-main = defaultMainWithDoctests "doctests"
-
-#else
-
-#ifdef MIN_VERSION_Cabal
--- If the macro is defined, we have new cabal-install,
--- but for some reason we don't have cabal-doctest in package-db
---
--- Probably we are running cabal sdist, when otherwise using new-build
--- workflow
-#warning You are configuring this package without cabal-doctest installed. \
-         The doctests test-suite will not work as a result. \
-         To fix this, install cabal-doctest before configuring.
-#endif
-
 import Distribution.Simple
-
-main :: IO ()
 main = defaultMain
-
-#endif
diff --git a/tests/doctests.hs b/tests/doctests.hs
deleted file mode 100644
--- a/tests/doctests.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module Main where
-
-import Build_doctests (flags, pkgs, module_sources)
-import Data.Foldable (traverse_)
-import Test.DocTest
-
-main :: IO ()
-main = do
-    traverse_ putStrLn args
-    doctest args
-  where
-    args = flags ++ pkgs ++ module_sources
diff --git a/tree-diff.cabal b/tree-diff.cabal
--- a/tree-diff.cabal
+++ b/tree-diff.cabal
@@ -1,5 +1,5 @@
 name:                tree-diff
-version:             0
+version:             0.0.0.1
 synopsis:            Diffing of (expression) trees.
 description:
   Common diff algorithm works on list structures:
@@ -36,7 +36,7 @@
 maintainer:          Oleg.Grenrus <oleg.grenrus@iki.fi>
 copyright:           (c) 2017 Oleg Grenrus
 category:            Data
-build-type:          Custom
+build-type:          Simple
 extra-source-files:  README.md ChangeLog.md
 cabal-version:       >=1.10
 tested-with:
@@ -47,10 +47,6 @@
 extra-source-files:
   fixtures/exfoo.expr
 
-custom-setup
-  setup-depends:
-    base, Cabal, cabal-doctest >=1.0.2 && <1.1
-
 source-repository head
   type:      git
   location:  https://github.com/phadej/tree-diff.git
@@ -70,7 +66,7 @@
     base                 >=4.7      && <4.11,
     aeson                >=1.2.1.0  && <1.3,
     ansi-wl-pprint       >=0.6.8.1  && <0.7,
-    ansi-terminal        >=0.6.3.1  && <0.7,
+    ansi-terminal        >=0.6.3.1  && <0.8,
     base-compat          >=0.9.3    && <0.10,
     bytestring           >=0.10.4.0 && <0.11,
     containers           >=0.5.5.1  && <0.6,
@@ -110,19 +106,6 @@
   hs-source-dirs:      src
   default-language:    Haskell2010
 
-test-suite doctests
-  type:                exitcode-stdio-1.0
-  main-is:             doctests.hs
-  x-doctest-options:   -D__DOCTEST__
-  build-depends:
-    base,
-    doctest              >=0.13.0   && <0.14,
-    template-haskell,
-    QuickCheck
-  ghc-options:         -Wall -threaded
-  hs-source-dirs:      tests
-  default-language:    Haskell2010
-
 test-suite test
   default-language:    Haskell2010
   type:                exitcode-stdio-1.0
@@ -137,6 +120,6 @@
     ansi-wl-pprint,
     parsec,
     trifecta             >=1.7.1.1  && <1.8,
-    tasty                >=0.11.2.5 && <0.12,
+    tasty                >=0.11.2.5 && <0.13,
     tasty-golden         >=2.3.1.1  && <2.4,
     tasty-quickcheck     >=0.9.1    && <0.10