Use visible name for service to mark it as a virtual one.

slapos/software/osie-coupler/buildout-opc-ua.hash.cfg

@@ -3,4 +3,4 @@ filename = instance-opc-ua.cfg.in
 md5sum = b4e97874308a5e402753fc3140d5b6d6
 
 filename = instance-opc-ua-x86.cfg.in
-md5sum = efd2e49aefeb668c7c545f76008c875b
+md5sum = a09e257f916683653b61483230034560

slapos/software/osie-coupler/instance-opc-ua-x86.cfg.in

@@ -25,7 +25,7 @@ environment =
 command-line =
     {{ buildout['bin-directory'] }}/server ${instance-parameter:configuration.coupler_block_device} ${instance-parameter:configuration.coupler_i2c_slave_list}
 
-wrapper-path = ${directory:service}/coupler-opc-ua
+wrapper-path = ${directory:service}/coupler-opc-ua-virtual
 
 [instance-parameter]
 # Fetch arbitrary parameters defined by the user in SlapOS Master for his instance.