diff --git a/.gitattributes b/.gitattributes
index 9b03811..a9bfeea 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -21,3 +21,4 @@
 *.xz filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
+*.changes merge=merge-changes
diff --git a/.gitignore b/.gitignore
index 57affb6..b593245 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 .osc
+*.obscpio
+*.osc
+_build.*
+.pbuild
diff --git a/_multibuild b/_multibuild
index c8c2e80..953db86 100644
--- a/_multibuild
+++ b/_multibuild
@@ -1,6 +1,5 @@
 <multibuild>
 <package>luajit</package>
-<package>lua51</package>
 <package>lua53</package>
 <package>lua54</package>
 <package>test</package>
diff --git a/lua-argparse.changes b/lua-argparse.changes
index 6cedf66..4e78c40 100644
--- a/lua-argparse.changes
+++ b/lua-argparse.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Fri Oct 24 14:47:00 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
+
+- Switch off building lua51 build of the package.
+
 -------------------------------------------------------------------
 Mon Oct 20 18:31:04 UTC 2025 - Matej Cepl <mcepl@cepl.eu>
 
diff --git a/lua-argparse.spec b/lua-argparse.spec
index ee3ba1e..a36a392 100644
--- a/lua-argparse.spec
+++ b/lua-argparse.spec
@@ -18,7 +18,7 @@
 
 %define flavor @BUILD_FLAVOR@
 %if "%{flavor}" == "test"
-%define flavor lua51
+%define flavor lua54
 %bcond_without test
 %else
 %bcond_with test