diff --git a/tools/platforms/BUILD b/tools/platforms/BUILD
index da6f476adb8565..13f7ff6a41709b 100644
--- a/tools/platforms/BUILD
+++ b/tools/platforms/BUILD
@@ -82,6 +82,11 @@ constraint_value(
     constraint_setting = ":os",
 )
 
+constraint_value(
+    name = "none",
+    constraint_setting = ":os",
+)
+
 # A default platform with nothing defined.
 platform(name = "default_platform")
 
diff --git a/tools/platforms/platforms.BUILD b/tools/platforms/platforms.BUILD
index 862c554f8e7222..9a207a9eb095c2 100644
--- a/tools/platforms/platforms.BUILD
+++ b/tools/platforms/platforms.BUILD
@@ -70,6 +70,11 @@ constraint_value(
     constraint_setting = ":os",
 )
 
+constraint_value(
+    name = "none",
+    constraint_setting = ":os",
+)
+
 # A default platform with nothing defined.
 platform(name = "default_platform")