Both links are broken; however, I'm not sure if SITES should be something else?
--- Makefile.orig Sat May 18 18:14:48 2024 +++ Makefile Sat May 18 18:15:36 2024 @@ -4,14 +4,14 @@ SHARED_LIBS= mxml 0.2 # 1.5 -HOMEPAGE= http://www.msweet.org/projects.php?Z3 +HOMEPAGE= https://www.msweet.org/mxml/ # LGPLv2 with exceptions PERMIT_PACKAGE= Yes WANTLIB= c -SITES= http://www.msweet.org/files/project3/ +SITES= https://www.msweet.org/mxml/ CONFIGURE_STYLE= gnu dest CONFIGURE_ARGS+= --disable-threads