diff --git a/xmlstarlet/xmlstarlet_build.py b/xmlstarlet/xmlstarlet_build.py
index 5b9fca73..f4ded6dd 100644
--- a/xmlstarlet/xmlstarlet_build.py
+++ b/xmlstarlet/xmlstarlet_build.py
@@ -30,7 +30,11 @@ def _get_config(args, strip_prefix=""):
 
 SOURCES = [
     os.path.relpath(s, ROOT_DIR)
-    for s in glob(os.path.join(PY_SOURCE_DIR, "**"), recursive=True)
+    for s in glob(os.path.join(PY_SOURCE_DIR))
+    if s.endswith(".c")
+] + [
+    os.path.relpath(s, ROOT_DIR)
+    for s in glob(os.path.join(C_SOURCE_DIR))
     if s.endswith(".c")
 ]
 
@@ -43,7 +47,7 @@ def _get_config(args, strip_prefix=""):
 FFIBUILDER.set_source(
     "xmlstarlet._xmlstarlet",
     """
-#include "src/xmlstar.h"
+#include "xmlstar.h"
 #include <libexslt/exslt.h>
 """,
     sources=SOURCES,