diff --git a/Propellor/CmdLine.hs b/Propellor/CmdLine.hs
index fa1d382..1f99288 100644
--- a/Propellor/CmdLine.hs
+++ b/Propellor/CmdLine.hs
@@ -106,6 +106,7 @@ pullFirst cmdline next = do
 		then next
 		else do
 			putStrLn "Rebuilding propeller.."
+			hFlush stdout
 			ifM (boolSystem "make" [Param "build"])
 				( void $ boolSystem "./propellor" [Param "--continue", Param (show cmdline)]
 				, error "Propellor build failed!"