diff --git a/plugins.go b/plugins.go
index c7b8ce7..feecfd1 100644
--- a/plugins.go
+++ b/plugins.go
@@ -29,7 +29,7 @@ func pluginExists(name string) (exists bool) {
 
 func makePluginName(name string) (decorated string) {
 	var template string
-	if execName, err := os.Executable(); err != nil || !strings.HasSuffix(execName, ".debug") {
+	if execName, err := os.Executable(); err != nil || strings.Index(execName, "debug") < 0 {
 		template = "expr-%s-plugin.so"
 	} else {
 		template = "expr-%s-plugin.so.debug"