diff --git a/README.md b/README.md
index faf64c3..66dfa7c 100644
--- a/README.md
+++ b/README.md
@@ -237,3 +237,12 @@ Primary key fingerprint: 3E80 CA1A 8B89 F69C BA57  D98A 76A5 EF90 5444 9A5C
 # more info
 
 - original issue: https://gitlab.com/pqq/pIssues.2/-/issues/254
+
+# misc notes
+
+- pacman
+  - error when building new packages: "somefile exists in both ..."
+  - solution: disable debug option
+    - `dots/pacman/.makepkg.conf`
+    - https://forum.endeavouros.com/t/debug-package-conflict-on-system-update/50905
+    - https://wiki.archlinux.org/title/makepkg