patch 7.4.1537
Problem:    Too many feature flags for pipes, jobs and channels.
Solution:   Only use FEAT_JOB_CHANNEL.
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index f6ab0db..d6e0d0a 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -529,7 +529,7 @@
 endif
 
 ifeq ($(CHANNEL),yes)
-DEFINES += -DFEAT_CHANNEL
+DEFINES += -DFEAT_JOB_CHANNEL
 endif
 
 # DirectWrite (DirectX)