diff --git a/Carbon/Carbon.psd1 b/Carbon/Carbon.psd1
index 907a78a5..6b949ec5 100644
--- a/Carbon/Carbon.psd1
+++ b/Carbon/Carbon.psd1
@@ -345,6 +345,8 @@ All functions are idempotent: when run multiple times with the same arguments, y
             # A URL to the main website for this project.
             ProjectUri = 'http://get-carbon.org/'
 
+            Prerelease = ''
+
             # ReleaseNotes of this module
             ReleaseNotes = @'
 * Carbon should now import in less than a second.
diff --git a/whiskey.yml b/whiskey.yml
index 0b698c8c..5dcb25a3 100644
--- a/whiskey.yml
+++ b/whiskey.yml
@@ -1,9 +1,12 @@
 PublishOn:
  - master
+ - prerelease
 
 Build:
 - Version:
     Path: Carbon\Carbon.psd1
+    Prerelease:
+    - prerelease: rc$(WHISKEY_BUILD_NUMBER)
 - PowerShell:
     OnlyBy: BuildServer
     Path: Save-CarbonSigningKey.ps1
@@ -193,11 +196,15 @@ Publish:
     RepositoryUri: https://www.powershellgallery.com/api/v2/
     ApiKeyID: powershellgallery.com
 - NuGetPush:
+    OnlyOnBranch:
+    - master
     UnlessExists: env:APPVEYOR_PULL_REQUEST_NUMBER
     Uri: https://nuget.org/api/v2/package
     ApiKeyID: nuget.org
     SkipUploadedCheck: true
 - NuGetPush:
+    OnlyOnBranch:
+    - master
     UnlessExists: env:APPVEYOR_PULL_REQUEST_NUMBER
     Uri: https://chocolatey.org/api/v2/package
     ApiKeyID: chocolatey.org