diff --git a/language/go/testdata/cgolib_with_build_tags/BUILD.want b/language/go/testdata/cgolib_with_build_tags/BUILD.want
index 5a7c81ebe..4e8ada89e 100644
--- a/language/go/testdata/cgolib_with_build_tags/BUILD.want
+++ b/language/go/testdata/cgolib_with_build_tags/BUILD.want
@@ -49,9 +49,15 @@ go_library(
         "@io_bazel_rules_go//go/platform:openbsd": [
             "example.com/repo/lib/deep",
         ],
+        "@io_bazel_rules_go//go/platform:osx": [
+            "example.com/repo/lib/deep",
+        ],
         "@io_bazel_rules_go//go/platform:plan9": [
             "example.com/repo/lib/deep",
         ],
+        "@io_bazel_rules_go//go/platform:qnx": [
+            "example.com/repo/lib/deep",
+        ],
         "@io_bazel_rules_go//go/platform:solaris": [
             "example.com/repo/lib/deep",
         ],
diff --git a/rule/platform.go b/rule/platform.go
index fffac4799..bfeeeeae6 100644
--- a/rule/platform.go
+++ b/rule/platform.go
@@ -87,6 +87,14 @@ var KnownPlatforms = []Platform{
 	{"openbsd", "amd64"},
 	{"openbsd", "arm"},
 	{"openbsd", "arm64"},
+	{"osx", "386"},
+	{"osx", "amd64"},
+	{"osx", "arm"},
+	{"osx", "arm64"},
+	{"qnx", "386"},
+	{"qnx", "amd64"},
+	{"qnx", "arm"},
+	{"qnx", "arm64"},
 	{"plan9", "386"},
 	{"plan9", "amd64"},
 	{"plan9", "arm"},