try other way

.forgejo/patches/build.patch

@@ -1,7 +1,7 @@
 diff --git a/usr/local/bin/build.sh.orig b/usr/local/bin/build.sh
 old mode 100644
 new mode 100755
-index c3b8f7a..b3c222e
+index c3b8f7a..94df4e8
 --- a/usr/local/bin/build.sh.orig
 +++ b/usr/local/bin/build.sh
 @@ -7,13 +7,14 @@
@@ -39,7 +39,7 @@ index c3b8f7a..b3c222e
  	esac
  }
  
-@@ -99,13 +104,13 @@ set_repositories_for() {
+@@ -99,14 +104,14 @@ set_repositories_for() {
  	local release
  
  	release=$(get_release)
@@ -52,10 +52,12 @@ index c3b8f7a..b3c222e
  		[ "$repo" = "$target_repo" ] && break
  	done
 -	doas sh -c "printf '%s\n' $repos > /etc/apk/repositories"
+-	doas apk update
 +	doas sh -c "printf '%s\n' $repos >> /etc/apk/repositories"
- 	doas apk update
++	doas apk update || true
  }
  
+ apply_offset_limit() {
 @@ -118,7 +123,15 @@ apply_offset_limit() {
  }