1 files changed, 1 insertions, 1 deletions
diff --git a/ghc.mk b/ghc.mk
index 1d6f02b9eb..0759961200 100644
--- a/ghc.mk
+++ b/ghc.mk
@@ -670,7 +670,7 @@ BUILD_DIRS += utils/mkUserGuidePart
 BUILD_DIRS += docs/users_guide
 BUILD_DIRS += utils/count_lines
 BUILD_DIRS += utils/compare_sizes
-ifeq "$(Windows_Host)" "NO"
+ifneq "$(Windows_Host)" "YES"
 BUILD_DIRS += iserv
 endif