diff --git a/main.jl b/main.jl
index 9362e58..e301351 100644
--- a/main.jl
+++ b/main.jl
@@ -9,8 +9,12 @@ using CoverageTools
 directories = get(ENV, "INPUT_DIRECTORIES", "src,ext")
 dirs = filter!(!isempty, split(directories, ","))
 for dir in dirs
-    isdir(dir) || error("directory \"$dir\" not found!")
+    if dir == "ext"
+        continue  # Silently skip this directory
+    elseif !isdir(dir)
+        error("directory \"$dir\" not found!")
+    end
 end
-
+filter!(isdir, dirs)
 pfs = mapreduce(process_folder, vcat, dirs)
 LCOV.writefile("lcov.info", pfs)