diff --git a/src/FetchOneCommand.ts b/src/FetchOneCommand.ts
index 3dd05a5..58c2e41 100644
--- a/src/FetchOneCommand.ts
+++ b/src/FetchOneCommand.ts
@@ -31,7 +31,7 @@ export default class FetchOneCommand extends Command<CommandContext> {
         const { locatorHash } = structUtils.parseLocator(this.locator, true);
         const pkg = project.originalPackages.get(locatorHash);
         if (!pkg) {
-          report.reportError(0, `Invalid locator`);
+          report.reportError(0, `Invalid locator: ${this.locator}`);
           return;
         }
 
diff --git a/src/InjectBuildCommand.ts b/src/InjectBuildCommand.ts
index b3e6c34..ee4b5c4 100644
--- a/src/InjectBuildCommand.ts
+++ b/src/InjectBuildCommand.ts
@@ -39,7 +39,7 @@ export default class InjectBuildCommand extends Command<CommandContext> {
         const locator = structUtils.parseLocator(this.locator, true);
         const pkg = project.storedPackages.get(locator.locatorHash);
         if (!pkg) {
-          report.reportError(0, `Invalid locator`);
+          report.reportError(0, `Invalid locator: ${this.locator}`);
           return;
         }