diff --git a/BuildBox/Command/System.hs b/BuildBox/Command/System.hs
--- a/BuildBox/Command/System.hs
+++ b/BuildBox/Command/System.hs
@@ -157,7 +157,8 @@
 			, std_in	= CreatePipe
 			, std_out	= CreatePipe
 			, std_err	= CreatePipe
-			, close_fds	= False }
+			, close_fds	= False 
+                        , create_group  = False }
 
 	-- Push input into in handle. Close the handle afterwards to ensure the
 	-- process gets sent the EOF character.
diff --git a/buildbox.cabal b/buildbox.cabal
--- a/buildbox.cabal
+++ b/buildbox.cabal
@@ -1,5 +1,5 @@
 Name:                buildbox
-Version:             1.5.2.2
+Version:             1.5.3.1
 License:             BSD3
 License-file:        LICENSE
 Author:              Ben Lippmeier
@@ -24,15 +24,15 @@
 
 Library
   Build-Depends: 
-        base           == 4.4.*,
+        base           == 4.5.*,
         containers     >= 0.4    && <  0.5,
-        time           >= 1.1    && <= 1.3,
+        time           >= 1.1    && <= 1.4,
         directory      >= 1.0    && <= 1.2,
         mtl            >= 2.0    && <  3.0,
         old-locale     == 1.0.*,
-        process        == 1.0.*,
+        process        == 1.1.*,
         random         == 1.0.*,
-        pretty         == 1.0.*,
+        pretty         == 1.1.*,
         bytestring     == 0.9.*,
         stm            == 2.2.*