diff --git a/cmd_build.go b/cmd_build.go
index 1efbdfd..a01fdae 100644
--- a/cmd_build.go
+++ b/cmd_build.go
@@ -12,9 +12,9 @@ import (
 var buildUsage = `
 warren build - Runs go build and populates the following variables:
 
-  Build.GitBranch
-  Build.GitHash
-  Build.Date
+  Build.GitBranch	from git
+  Build.GitHash		from git
+  Build.Date		from system time
 `
 
 var buildCmd = &Command{