diff --git a/pkgs/development/libraries/haskell/stm-conduit/default.nix b/pkgs/development/libraries/haskell/stm-conduit/default.nix
index e6c1d64857d..94117bd1663 100644
--- a/pkgs/development/libraries/haskell/stm-conduit/default.nix
+++ b/pkgs/development/libraries/haskell/stm-conduit/default.nix
@@ -1,13 +1,16 @@
-{ cabal, conduit, resourcet, stm, stmChans, transformers, HUnit, QuickCheck
-, testFramework, testFrameworkHunit, testFrameworkQuickcheck2 }:
+{ cabal, conduit, HUnit, QuickCheck, resourcet, stm, stmChans
+, testFramework, testFrameworkHunit, testFrameworkQuickcheck2
+, transformers
+}:
 
 cabal.mkDerivation (self: {
   pname = "stm-conduit";
   version = "1.0.0";
   sha256 = "1kkx3x3qdqw5jp9vn9kxbxmmb8x0wdbp8jch08azw45pwjh3ga7v";
-  buildDepends = [
-    conduit resourcet stm stmChans transformers HUnit QuickCheck
-    testFramework testFrameworkHunit testFrameworkQuickcheck2
+  buildDepends = [ conduit resourcet stm stmChans transformers ];
+  testDepends = [
+    conduit HUnit QuickCheck stm stmChans testFramework
+    testFrameworkHunit testFrameworkQuickcheck2 transformers
   ];
   meta = {
     homepage = "https://github.com/wowus/stm-conduit";