diff --git a/src/Test/Sandbox/Internals.hs b/src/Test/Sandbox/Internals.hs
--- a/src/Test/Sandbox/Internals.hs
+++ b/src/Test/Sandbox/Internals.hs
@@ -39,7 +39,11 @@
 import System.IO
 import System.IO.Error (isEOFError, tryIOError)
 import System.Posix hiding (killProcess)
+#if MIN_VERSION_process(1,2,1)
+import System.Process hiding (env, waitForProcess, createPipe)
+#else
 import System.Process hiding (env, waitForProcess)
+#endif
 import System.Process.Internals (withProcessHandle, ProcessHandle__(OpenHandle))
 import System.Random
 import System.Random.Shuffle
diff --git a/test-sandbox.cabal b/test-sandbox.cabal
--- a/test-sandbox.cabal
+++ b/test-sandbox.cabal
@@ -1,5 +1,5 @@
 Name:           test-sandbox
-Version:        0.0.1.10
+Version:        0.0.1.11
 Cabal-Version:  >= 1.14
 Category:       Testing
 Synopsis:       Sandbox for system tests
@@ -25,7 +25,7 @@
 Source-Repository this
     Type:       git
     Location:   https://github.com/gree/haskell-test-sandbox
-    Tag:        test-sandbox_0.0.1.10
+    Tag:        test-sandbox_0.0.1.11
 
 Library
     Exposed-modules:    Test.Sandbox