diff --git a/scripts/build.sh b/scripts/build.sh
index fba813fb6..2b4dbd411 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -17,7 +17,7 @@ GIT_DIRTY="$(test -n "`git status --porcelain`" && echo "+CHANGES" || true)"
 
 # Determine the arch/os combos we're building for
 XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
-XC_OS=${XC_OS:-darwin dragonfly freebsd linux netbsd openbsd solaris windows}
+XC_OS=${XC_OS:-darwin}
 
 # Delete the old dir
 echo "==> Removing old directory..."