diff --git a/src/config.ts b/src/config.ts
index 7f60c43e..9ea4db46 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -184,6 +184,8 @@ export class Config implements IConfig {
     s3.bucket = this.scopedEnvVar('S3_BUCKET') || s3.bucket
     if (s3.bucket && !s3.host) s3.host = `https://${s3.bucket}.s3.amazonaws.com`
     s3.templates = {
+      platformBaseDir: '<%- bin %>',
+      vanillaBaseDir: '<%- bin %>',
       platformTarball: '<%- name %>/channels/<%- channel %>/<%- bin %>-v<%- version %>/<%- bin %>-v<%- version %>-<%- platform %>-<%- arch %>',
       vanillaTarball: '<%- name %>/channels/<%- channel %>/<%- bin %>-v<%- version %>/<%- bin %>-v<%- version %>',
       platformManifest: '<%- name %>/channels/<%- channel %>/<%- platform %>-<%- arch %>',
diff --git a/src/pjson.ts b/src/pjson.ts
index 6f91d832..2bc612a0 100644
--- a/src/pjson.ts
+++ b/src/pjson.ts
@@ -37,6 +37,8 @@ export namespace PJSON {
             vanillaTarball: string
             platformManifest: string
             vanillaManifest: string
+            platformBaseDir: string
+            vanillaBaseDir: string
           }
         }
         // github?: {}