diff --git a/src/deb/mod.rs b/src/deb/mod.rs
index 794b0e7..b24415c 100644
--- a/src/deb/mod.rs
+++ b/src/deb/mod.rs
@@ -102,7 +102,7 @@ pub(crate) fn find_package_directory(
 
     // Try package/package pattern first
     let package_dir = parent_dir.join(package).join(package);
-    if ctx.exists(&package_dir)? {
+    if ctx.exists(&package_dir)? && ctx.exists(&package_dir.join("debian"))? {
         return Ok(package_dir);
     }
 
@@ -117,19 +117,19 @@ pub(crate) fn find_package_directory(
     let package_dir = parent_dir
         .join(package)
         .join(format!("{}-{}", package, origversion));
-    if ctx.exists(&package_dir)? {
+    if ctx.exists(&package_dir)? && ctx.exists(&package_dir.join("debian"))? {
         return Ok(package_dir);
     }
 
     // Try 'package' only
     let package_dir = parent_dir.join(package);
-    if ctx.exists(&package_dir)? {
+    if ctx.exists(&package_dir)? && ctx.exists(&package_dir.join("debian"))? {
         return Ok(package_dir);
     }
 
     // Try package-origversion only
     let package_dir = parent_dir.join(format!("{}-{}", package, origversion));
-    if ctx.exists(&package_dir)? {
+    if ctx.exists(&package_dir)? && ctx.exists(&package_dir.join("debian"))? {
         return Ok(package_dir);
     }