diff --git a/Formula/brewsci-mumps.rb b/Formula/brewsci-mumps.rb
index 1b03162..57a2717 100644
--- a/Formula/brewsci-mumps.rb
+++ b/Formula/brewsci-mumps.rb
@@ -1,7 +1,9 @@
 class BrewsciMumps < Formula
   desc "Parallel Sparse Direct Solver"
-  homepage "http://mumps-solver.org"
-  url "http://mumps.enseeiht.fr/MUMPS_5.3.5.tar.gz"
+  homepage "https://mumps-solver.org"
+  # The old mumps.enseeiht.fr mirror no longer responds; the official
+  # mumps-solver.org host serves the identical tarball (same sha256).
+  url "https://mumps-solver.org/MUMPS_5.3.5.tar.gz"
   sha256 "e5d665fdb7043043f0799ae3dbe3b37e5b200d1ab7a6f7b2a4e463fd89507fa4"
 
   bottle do
@@ -129,33 +131,39 @@ def install
 
     # make shared lib
     so = OS.mac? ? "dylib" : "so"
-    all_load = OS.mac? ? "-all_load" : "--whole-archive"
-    noall_load = OS.mac? ? "-noall_load" : "--no-whole-archive"
+    # Force-load the static archive into the shared lib. The macOS branch used
+    # "-all_load <archive> ... -noall_load", but the linker in Xcode 16+ removed
+    # -noall_load ("ld: unknown options: -noall_load"). -force_load,<archive>
+    # targets a single archive and needs no matching "undo" flag; Linux keeps the
+    # --whole-archive / --no-whole-archive wrap around the .a.
+    force_load = lambda do |archive|
+      OS.mac? ? ["-Wl,-force_load,#{archive}"] : ["-Wl,--whole-archive", archive, "-Wl,--no-whole-archive"]
+    end
     compiler = OS.mac? ? "gfortran" : "mpif90" # mpif90 causes segfaults on macOS
     shopts = OS.mac? ? ["-undefined", "dynamic_lookup"] : []
     install_name = ->(libname) { OS.mac? ? ["-Wl,-install_name", "-Wl,#{lib}/#{libname}.#{so}"] : [] }
     cd "lib" do
       libpord_install_name = install_name.call("libpord")
-      system compiler, "-fPIC", "-shared", "-Wl,#{all_load}", "libpord.a", *lib_args, \
-             "-Wl,#{noall_load}", *libpord_install_name, *shopts, "-o", "libpord.#{so}"
+      system compiler, "-fPIC", "-shared", *force_load.call("libpord.a"), *lib_args, \
+             *libpord_install_name, *shopts, "-o", "libpord.#{so}"
       lib.install "libpord.#{so}"
       libmumps_common_install_name = install_name.call("libmumps_common")
-      system compiler, "-fPIC", "-shared", "-Wl,#{all_load}", "libmumps_common.a", *lib_args, \
-             "-L#{lib}", "-lpord", "-Wl,#{noall_load}", *libmumps_common_install_name, \
+      system compiler, "-fPIC", "-shared", *force_load.call("libmumps_common.a"), *lib_args, \
+             "-L#{lib}", "-lpord", *libmumps_common_install_name, \
              *shopts, "-o", "libmumps_common.#{so}"
       lib.install "libmumps_common.#{so}"
       %w[libsmumps libdmumps libcmumps libzmumps].each do |l|
         libinstall_name = install_name.call(l)
-        system compiler, "-fPIC", "-shared", "-Wl,#{all_load}", "#{l}.a", *lib_args, \
-               "-L#{lib}", "-lpord", "-lmumps_common", "-Wl,#{noall_load}", *libinstall_name, \
+        system compiler, "-fPIC", "-shared", *force_load.call("#{l}.a"), *lib_args, \
+               "-L#{lib}", "-lpord", "-lmumps_common", *libinstall_name, \
                *shopts, "-o", "#{l}.#{so}"
       end
     end
     if build.without? "open-mpi"
       cd "libseq" do
         libmpiseq_install_name = install_name.call("libmpiseq")
-        system compiler, "-fPIC", "-shared", "-Wl,#{all_load}", "libmpiseq.a", *lib_args, \
-               "-Wl,#{noall_load}", *libmpiseq_install_name, *shopts, "-o", "libmpiseq.#{so}"
+        system compiler, "-fPIC", "-shared", *force_load.call("libmpiseq.a"), *lib_args, \
+               *libmpiseq_install_name, *shopts, "-o", "libmpiseq.#{so}"
       end
     end