diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 4fc7ebc..9aab9b8 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,6 +9,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-20.04
+    strategy:
+      matrix:
+        cross_tool: [ "m68k-atari-mint" ]
     steps:
       - uses: actions/checkout@v4
       - name: Install SSH keys
@@ -16,14 +19,17 @@ jobs:
         env:
           SSH_ID: ${{ secrets.SSH_ID }}
         run: ./.scripts/install_ssh_id.sh
-      - name: Install packages
-        run: |
-          SYSROOT_DIR="/" ./.scripts/install-freemint.sh binutils gcc mintbin
       - name: Setup environment
         env:
           PROJECT_VERSION: "0.60.1"
+          CROSS_TOOL: ${{ matrix.cross_tool }}
         run: ./.scripts/setup_env.sh
+      - name: Install packages
+        run: |
+          SYSROOT_DIR="/" ./.scripts/install-freemint.sh binutils gcc mintbin
       - name: build
+        env:
+          CROSS_TOOL: ${{ matrix.cross_tool }}
         run: ./.scripts/build.sh
       - name: deploy
         if: ${{ github.event_name == 'push' }}
diff --git a/.scripts/build.sh b/.scripts/build.sh
index 85e2438..6b3d7ee 100755
--- a/.scripts/build.sh
+++ b/.scripts/build.sh
@@ -3,30 +3,21 @@
 # -u: Treat unset variables as an error when substituting.
 # -x: Display expanded script commands
 
+if test "$CROSS_TOOL" = ""; then
+  CROSS_TOOL=m68k-atari-mint
+  export CROSS_TOOL
+fi
+
 make SHELL=/bin/bash
 make SHELL=/bin/bash DESTDIR="${INSTALL_DIR}" install
 
 ARCHIVE_NAME="${PROJECT_NAME}-${PROJECT_VERSION}-${SHORT_ID}"
-BINFILES="
-sbin/tzinit
-usr/sbin/tzselect
-usr/sbin/zdump
-usr/sbin/zic
-"
-
-if file ${INSTALL_DIR}/usr/sbin/zic | grep a.out; then
-  TARGET=m68k-atari-mint
-elif file ${INSTALL_DIR}/usr/sbin/zic | grep ELF; then
-  TARGET=m68k-atari-mintelf
-else
-  echo "unknown file format" >&2
-  exit 2
-fi
+BINFILES="sbin/tzinit usr/sbin/tzselect usr/sbin/zdump usr/sbin/zic"
 
 rm -f tz/*.o
 make -C tz DESTDIR="${INSTALL_DIR}" type=m68020 install
 cd "${INSTALL_DIR}"
-${TARGET}-strip $BINFILES
+: ${CROSS_TOOL}-strip $BINFILES
 tar cjf "${DEPLOY_DIR}/${ARCHIVE_NAME}-020.${DEPLOY_ARCHIVE} $BINFILES usr/share/zoneinfo
 rm -f $BINFILES
 cd -
@@ -34,7 +25,7 @@ cd -
 rm -f tz/*.o
 make -C tz DESTDIR="${INSTALL_DIR}" type=coldfire install
 cd "${INSTALL_DIR}"
-${TARGET}-strip $BINFILES
+: ${CROSS_TOOL}-strip $BINFILES
 tar cjf "${DEPLOY_DIR}/${ARCHIVE_NAME}-v4e.${DEPLOY_ARCHIVE} $BINFILES usr/share/zoneinfo
 rm -f $BINFILES
 cd -
@@ -42,6 +33,6 @@ cd -
 rm -f tz/*.o
 make -C tz DESTDIR="${INSTALL_DIR}" type=m68000 install
 cd "${INSTALL_DIR}"
-${TARGET}-strip $BINFILES
+:  ${CROSS_TOOL}-strip $BINFILES
 tar cjf "${DEPLOY_DIR}/${ARCHIVE_NAME}-000.${DEPLOY_ARCHIVE} $BINFILES usr/share/zoneinfo
 cd -