diff --git a/scripts/build.sh b/scripts/build.sh
index 68ef77669c..ccc63bffcd 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -18,7 +18,7 @@ GIT_DESCRIBE=$(git describe --tags)
 
 # Determine the arch/os combos we're building for
 XC_ARCH=${XC_ARCH:-"386 amd64 arm"}
-XC_OS=${XC_OS:-"darwin freebsd linux netbsd openbsd windows"}
+XC_OS=${XC_OS:-"darwin freebsd linux windows"}
 
 # Install dependencies
 echo "==> Getting dependencies..."