diff --git a/pkgs/servers/http/nginx/modules.nix b/pkgs/servers/http/nginx/modules.nix
index 6b4268d54801..64be47874a40 100644
--- a/pkgs/servers/http/nginx/modules.nix
+++ b/pkgs/servers/http/nginx/modules.nix
@@ -282,7 +282,7 @@ let self = {
       cp -r "${src}/" "$lua_src"
       chmod -R +w "$lua_src"
       patch -p1 -d $lua_src -i ${nginx-1-23-patch}
-      export configureFlags="''${configureFlags/"${src}"/"$lua_src"}"
+      export configureFlags="''${configureFlags//"${src}"/"$lua_src"}"
       unset lua_src
     '';
     allowMemoryWriteExecute = true;