diff --git a/src/commands/generate-all.ts b/src/commands/generate-all.ts
index c5272aa..9abf22f 100644
--- a/src/commands/generate-all.ts
+++ b/src/commands/generate-all.ts
@@ -19,7 +19,7 @@ export default class GenerateFull extends Command {
     help: flags.help({char: 'h'}),
     aapt2: flags.string({char: 'a', description: 'path to aapt2 executable', default: 'out/host/linux-x86/bin/aapt2'}),
     buildId: flags.string({char: 'b', description: 'build ID of the stock images'}),
-    stockSrc: flags.string({char: 's', description: 'path to (extracted) factory images, (mounted) images, or directory containing any such files (optionally under device and/or build ID directory)', required: true}),
+    stockSrc: flags.string({char: 's', description: 'path to (extracted) factory images, (mounted) images, (extracted) OTA package, OTA payload, or directory containing any such files (optionally under device and/or build ID directory)', required: true}),
     customSrc: flags.string({char: 'c', description: 'path to AOSP build output directory (out/) or JSON state file', default: 'out'}),
     factoryZip: flags.string({char: 'f', description: 'path to stock factory images zip (for extracting firmware if stockSrc is not factory images)'}),
     skipCopy: flags.boolean({char: 'k', description: 'skip file copying and only generate build files'}),
diff --git a/src/commands/generate-prep.ts b/src/commands/generate-prep.ts
index 8ee7908..9cf4cf6 100644
--- a/src/commands/generate-prep.ts
+++ b/src/commands/generate-prep.ts
@@ -15,7 +15,7 @@ export default class GeneratePrep extends Command {
   static flags = {
     help: flags.help({char: 'h'}),
     buildId: flags.string({char: 'b', description: 'build ID of the stock images'}),
-    stockSrc: flags.string({char: 's', description: 'path to root of mounted stock system images (./system_ext, ./product, etc.)', required: true}),
+    stockSrc: flags.string({char: 's', description: 'path to (extracted) factory images, (mounted) images, (extracted) OTA package, OTA payload, or directory containing any such files (optionally under device and/or build ID directory)', required: true}),
     skipCopy: flags.boolean({char: 'k', description: 'skip file copying and only generate build files'}),
   }