fix build

businesscard-qrcode.cls

@@ -80,6 +80,8 @@
 \RequirePackage{graphicx} % needed for optional photo
 \RequirePackage{tikz} % needed for logo overlay in QR code
 \RequirePackage{eso-pic} % needed for background images without layout impact
+% Fix XeLaTeX opacity issue: ensure TikZ/PGF is loaded before eso-pic uses opacity
+\DeclareHookRule{shipout/background}{pgfrcs}{>}{eso-pic}
 \RequirePackage[\content,top=\padding,left=\padding,right=\padding,bottom=\padding]{geometry}
 %\RequirePackage{pbox}
 \RequirePackage{varwidth}
@@ -383,15 +385,15 @@ END:VCARD\BCQ@nl}
 	\ifcsdef{Xbackground}{%
 		\IfFileExists{\Xbackground}{%
 			% It's an image file: add to background using eso-pic (no layout impact)
-			% Fix XeLaTeX opacity issue: ensure TikZ/PGF is loaded before opacity is used
-			\AddToHook{shipout/background}[businesscard]{%
-				\put (\LenToUnit{.5\paperwidth},\LenToUnit{-.5\paperheight}) {%
-					\tikz[overlay]{\node[opacity=\fpeval{\BCQ@bgopacity}, inner sep=0pt] at (0,0) {%
-						\includegraphics[height=\fpeval{\BCQ@bgscale}\paperheight]{\Xbackground}%
-					};}%
+			\AddToShipoutPictureBG*{%
+				\AtPageCenter{%
+					\begin{tikzpicture}[overlay]
+						\node[inner sep=0pt, opacity=\fpeval{\BCQ@bgopacity}] at (0,0) {%
+							\includegraphics[height=\fpeval{\BCQ@bgscale}\paperheight]{\Xbackground}%
+						};
+					\end{tikzpicture}%
 				}%
 			}%
-			\DeclareHookRule{shipout/background}{pgfrcs}{>}{businesscard}%
 		}{%
 			% Not a file: treat as color
 			\pagecolor{\Xbackground}%