diff --git a/src/commands/spec.ts b/src/commands/spec.ts
index 41f223f..c89d467 100644
--- a/src/commands/spec.ts
+++ b/src/commands/spec.ts
@@ -16,7 +16,7 @@ export interface RunCPUOptions {
      */
     benchmarks?: string[];
 
-    buildType?: "nobuild" | "rebuild" | "plain",
+    buildType?: "nobuild" | "rebuild",
 
     /**
      * Default: HTML and text
@@ -77,7 +77,7 @@ export function runcpuOptions(o: RunCPUOptions): string[] {
                     return ["--nobuild"];
                 case "rebuild":
                     return ["--rebuild"];
-                case "plain":
+                default:
                     return [];
             }
         }),