diff --git a/bin/miaou-bash b/bin/miaou-bash
index 73d4528..4baa463 100755
--- a/bin/miaou-bash
+++ b/bin/miaou-bash
@@ -96,9 +96,18 @@ function on_exit {
             else
               regex='^(.*): No such file or directory$'
               if [[ "$message" =~ $regex ]]; then
-                #TODO: SOURCE_NOT_FOUND or FILE_NOT_FOUND
-                failure_type='SOURCE NOT FOUND'
-                failure_payload="${BASH_REMATCH[1]} line=${line}"
+                failure_payload="${BASH_REMATCH[1]}"
+                if [[ $code == 1 ]]; then
+                  failure_type='SOURCE NOT FOUND'
+                  stack_lines[0]=$line
+                else
+                  if [[ $code == 127 ]]; then
+                    failure_type='FILE NOT FOUND'
+                    # TODO: print a warning hint in stderr like so: prefer source rather than subshell
+                  else
+                    failure_type='UNKNOWN NOT FOUND'
+                  fi
+                fi
               else
                 failure_type='UNKNOWN'
                 failure_payload="${message}"