diff --git a/src/package.coffee b/src/package.coffee
index aa6afc3ce..ebc771123 100644
--- a/src/package.coffee
+++ b/src/package.coffee
@@ -572,12 +572,12 @@ class Package
         SyntaxError: #{error.message}
           at #{location}
       """
-    else if error.type and error.filename and error.column? and error.line?
+    else if error.less and error.filename and error.column? and error.line?
       # Less errors
       location = "#{error.filename}:#{error.line}:#{error.column}"
       detail = "#{error.message} in #{location}"
       stack = """
-        Error: #{error.message}
+        LessError: #{error.message}
           at #{location}
       """
     else
diff --git a/src/theme-manager.coffee b/src/theme-manager.coffee
index f6025d4d4..0ff42c4d2 100644
--- a/src/theme-manager.coffee
+++ b/src/theme-manager.coffee
@@ -318,6 +318,7 @@ class ThemeManager
       else
         @lessCache.read(lessStylesheetPath)
     catch error
+      error.less = true
       if error.line?
         # Adjust line numbers for import fallbacks
         error.line -= 2 if importFallbackVariables