diff --git a/maintainers/patches b/maintainers/patches
index eaa58db..2360407 100755
--- a/maintainers/patches
+++ b/maintainers/patches
@@ -1,7 +1,10 @@
 #!/bin/bash
 set -e
 
+shopt -s nullglob
+
 PROGRAM="$0"
+MODULES=(tock libtock-rs)
 
 success() {
   echo -e "\e[1;32mDone:\e[m $1"
@@ -20,7 +23,8 @@ commit() {
 }
 
 get_root() {
-  git ls-tree HEAD:third_party | sed -En 's/^.* ([^ ]+)\ttock$/\1/p'
+  local module="$1"
+  git ls-tree HEAD:third_party | sed -En 's/^.* ([^ ]+)\t'"${module}"'$/\1/p'
 }
 
 get_head() {
@@ -32,17 +36,17 @@ help() {
   cat <<EOF
 Usage: ${PROGRAM} {apply|save}
 
-  apply       Applies the patches to the Tock submodule regardless of its state.
+  apply       Applies the patches to the submodules regardless of their state.
               As a consequence this can always be called to get to a clean state
               but may result in data loss if there are unsaved changes.
 
-  save        Saves the Tock submodule to the patches.
+  save        Saves the submodules to the patches.
               This should only be called after apply and when all changes have
               been added to a commit. After saving, you can run ./setup.sh to
-              return to normal state. Otherwise you can continue editing Tock
-              and calling save.
+              return to normal state. Otherwise you can continue editing the
+              submodules and calling save.
 
-  restore     Restores the Tock submodule to its normal state regardless of its
+  restore     Restores the submodules to its normal state regardless of their
               state. As a consequence this can always be called to get to a
               clean state but may result in data loss if there are unsaved
               changes.
@@ -53,19 +57,19 @@ Example:
 
     ${PROGRAM} apply
 
-  2. Edit files in the Tock submodule:
+  2. Edit files in the submodules:
 
-    cd third_party/tock
+    cd third_party/<submodule>
     edit <files>
 
-  3. Create a fix commit per affected patch by repeating the following commands
-  until there are no more files to add:
+  3. For each edited submodule, create a fix commit per affected patch by
+  repeating the following commands until there are no more files to add:
 
     git add -p
     git commit -m'fix <patch#>'
 
-  4. Merge the fixes into their patches by moving their line below their patch
-  and changing their "edit" into "fixup":
+  4. For each edited submodule, merge the fixes into their patches by moving
+  their line below their patch and changing their "edit" into "fixup":
 
     git rebase -i ${root}
 
@@ -82,43 +86,53 @@ EOF
 }
 
 apply() {
-  local root="$(get_root)"
-  ( set -e
-    cd third_party/tock
-    git reset -q --hard
-    git clean -qfxd
-    git checkout -q "${root}"
-    cp -a ../../boards .
-    commit '00-boards'
-    for file in ../../patches/tock/*; do
-      git apply "${file}"
-      commit "$(basename "${file}" .patch)"
-    done
-  )
+  for module in "${MODULES[@]}"; do
+    local root="$(get_root "${module}")"
+    ( set -e
+      cd third_party/"${module}"
+      git reset -q --hard
+      git clean -qfxd
+      git checkout -q "${root}"
+      if [[ "${module}" == tock ]]; then
+        cp -a ../../boards .
+        commit '00-boards'
+      fi
+      for file in ../../patches/"${module}"/*; do
+        git apply "${file}"
+        commit "$(basename "${file}" .patch)"
+      done
+    )
+  done
 }
 
 save() {
-  local root="$(get_root)"
-  ( set -e
-    cd third_party/tock
-    [[ -z "$(git status -s)" ]] || fail 'The Tock submodule is not clean.'
-    rm ../../patches/tock/*.patch
-    for file in $(git format-patch "${root}"); do
-      sed -n '/^diff/,$p' "${file}" \
-        | sed '/^-- $/,$d' > "../../patches/tock/${file#*-}"
-    done
-    git clean -qfxd
-    top="$(get_head)"
-    git checkout -q "${root}"
-    rm -r boards
-    git apply --whitespace=nowarn ../../patches/tock/00-boards.patch
-    rm ../../patches/tock/00-boards.patch
-    rm -r ../../boards
-    cp -a boards ../..
-    git reset -q --hard
-    git clean -qfxd
-    git checkout -q "${top}"
-  )
+  for module in "${MODULES[@]}"; do
+    local root="$(get_root "${module}")"
+    ( set -e
+      cd third_party/"${module}"
+      [[ -z "$(git status -s)" ]] \
+        || fail "The ${module} submodule is not clean."
+      rm -rf ../../patches/"${module}"
+      mkdir ../../patches/"${module}"
+      for file in $(git format-patch "${root}"); do
+        sed -n '/^diff/,$p' "${file}" \
+          | sed '/^-- $/,$d' > "../../patches/${module}/${file#*-}"
+      done
+      git clean -qfxd
+      top="$(get_head)"
+      git checkout -q "${root}"
+      if [[ "${module}" == tock ]]; then
+        rm -r boards
+        git apply --whitespace=nowarn ../../patches/"${module}"/00-boards.patch
+        rm ../../patches/tock/00-boards.patch
+        rm -r ../../boards
+        cp -a boards ../..
+      fi
+      git reset -q --hard
+      git clean -qfxd
+      git checkout -q "${top}"
+    )
+  done
 }
 
 grep -q third_party/tock .gitmodules 2>/dev/null \
@@ -127,17 +141,17 @@ grep -q third_party/tock .gitmodules 2>/dev/null \
 case $1 in
   apply)
     apply
-    success 'Applied the patches to the Tock submodule.'
+    success 'Applied the patches to the submodules.'
     ;;
   save)
     save
-    success 'Saved the Tock submodule to the patches.'
+    success 'Saved the submodules to the patches.'
     ;;
   restore)
     # Ovewrite the commit function to do nothing.
     commit() { true; }
     apply
-    success 'Restored the Tock submodule.'
+    success 'Restored the submodules.'
     ;;
   *) fail 'Unexpected argument. Run without argument for help.' ;;
 esac
diff --git a/patches/libtock-rs/01-macos.patch b/patches/libtock-rs/01-macos.patch
new file mode 100644
index 0000000..5f25664
--- /dev/null
+++ b/patches/libtock-rs/01-macos.patch
@@ -0,0 +1,12 @@
+diff --git a/core/src/stack_size.rs b/core/src/stack_size.rs
+index 9145393..ef55383 100644
+--- a/core/src/stack_size.rs
++++ b/core/src/stack_size.rs
+@@ -14,6 +14,7 @@ macro_rules! stack_size {
+     {$size:expr} => {
+         #[no_mangle]
+         #[link_section = ".stack_buffer"]
++        #[cfg(not(target_os = "macos"))]
+         pub static mut STACK_MEMORY: [u8; $size] = [0; $size];
+     }
+ }
diff --git a/patches/tock/03-additional-boards.patch b/patches/tock/03-additional-boards.patch
index 754c64a..97774b9 100644
--- a/patches/tock/03-additional-boards.patch
+++ b/patches/tock/03-additional-boards.patch
@@ -1,5 +1,5 @@
 diff --git a/Cargo.toml b/Cargo.toml
-index 06acc26d2..e5db0740b 100644
+index 06acc26d2..bd1bbd58f 100644
 --- a/Cargo.toml
 +++ b/Cargo.toml
 @@ -20,7 +20,13 @@ members = [
diff --git a/setup-submodules.sh b/setup-submodules.sh
index 7ed9288..2f6c273 100755
--- a/setup-submodules.sh
+++ b/setup-submodules.sh
@@ -18,6 +18,7 @@ export TERM=${TERM:-vt100}
 done_text="$(tput bold)DONE.$(tput sgr0)"
 
 set -e
+shopt -s nullglob
 
 # Ensure the submodules are pulled and up-to-date
 git submodule update --init
@@ -40,35 +41,19 @@ echo -n '[-] Copying additional boards to Tock... '
 cp -r boards/* third_party/tock/boards
 echo $done_text
 
-# Apply patches to kernel. Do that in a sub-shell.
-(
-  cd third_party/tock/ && \
-  for p in ../../patches/tock/*.patch
-  do
-    echo -n '[-] Applying patch "'$(basename $p)'"... '
-    if git apply "$p"
-    then
-      echo $done_text
-    else
-      patch_conflict_detected
-    fi
-  done
-)
-
-# Now apply patches to libtock-rs. Do that in a sub-shell.
-#
-# Commented out as there are not patches at the moment, and the pattern fails in
-# that case.
-#(
-#  cd third_party/libtock-rs/ && \
-#  for p in ../../patches/libtock-rs/*.patch
-#  do
-#    echo -n '[-] Applying patch "'$(basename $p)'"... '
-#    if git apply "$p"
-#    then
-#      echo $done_text
-#    else
-#      patch_conflict_detected
-#    fi
-#  done
-#)
+for module in tock libtock-rs; do
+  # Apply patches to the submodule. Do that in a sub-shell.
+  (
+    cd third_party/"${module}"/ && \
+      for p in ../../patches/"${module}"/*.patch
+      do
+        echo -n '[-] Applying patch "'$(basename $p)'"... '
+        if git apply "$p"
+        then
+          echo $done_text
+        else
+          patch_conflict_detected
+        fi
+      done
+  )
+done