lib/omnibus/config.rb in omnibus-7.0.13 vs lib/omnibus/config.rb in omnibus-7.0.34

@@ -12,10 +12,10 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
 
-require "singleton"
+require "singleton" unless defined?(Singleton)
 
 module Omnibus
   class Config
     include Cleanroom
     include NullArgumentable