diff --git a/.github/workflows/build-binaries.yml b/.github/workflows/build-binaries.yml
index 922462ab9..1da0443b5 100644
--- a/.github/workflows/build-binaries.yml
+++ b/.github/workflows/build-binaries.yml
@@ -12,10 +12,27 @@ jobs:
       matrix: # Build debug and/or production
         debug: ['']      # '' if production, 'debug' for debug
         os: [macos-11, ubuntu-20.04, windows-latest]
+        cross: ['', aarch64]
+        exclude:
+          - os: windows-latest
+            cross: aarch64
+          - os: macos-11
+            cross: aarch64
     runs-on: ${{ matrix.os }}
     steps:
       - run: git config --global core.autocrlf input
         shell: bash
+      - name: Unpack cross toolchain from AWS S3
+        if: ${{ matrix.cross != '' }}
+        env:
+          AWS_ACCESS_KEY_ID: ${{secrets.GHA_CACHE_ACCESS_KEY_ID}}
+          AWS_SECRET_ACCESS_KEY: ${{secrets.GHA_CACHE_SECRET}}
+          AWS_DEFAULT_REGION: eu-west-1
+        run: |
+            aws s3 cp . s3://adacore-gha-tray-eu-west-1/libadalang/ --recursive --exclude "*" --include "*.tar.bz2" --sse=AES256
+            sudo apt install -y libc6-dev-arm64-cross linux-libc-dev-arm64-cross binutils-aarch64-linux-gnu
+            sudo tar xavf ${{ matrix.cross }}-${{ runner.os }}-gcc-13.2.tar.bz2 -C /
+            sudo tar xavf ${{ matrix.cross }}-${{ runner.os }}-gmp-6.2.1.tar.bz2 -C /
       - name: Force Alire to use preinstalled MSYS2
         if: ${{ runner.os == 'Windows' }}
         shell: bash
@@ -57,7 +74,6 @@ jobs:
         with:
           repository: AdaCore/gpr
           path: gpr2
-          ref: edge
       - name: Get gprconfig kb
         uses: actions/checkout@v3
         with:
@@ -86,11 +102,11 @@ jobs:
           python-version: '3.10'
       - name: Build Libadalang and its dependencies
         shell: bash
-        run: utils/gh-build-binaries.sh "${{ matrix.debug }}" ${{ runner.os }}
+        run: utils/gh-build-binaries.sh "${{ matrix.debug }}" ${{ runner.os }} "${{ matrix.cross }}"
       - name: Keep artifacts
         uses: actions/upload-artifact@v3
         with:
-          name: ${{ runner.os }}-${{ matrix.debug }}
+          name: ${{ runner.os }}-${{ matrix.debug }}${{ matrix.cross }}
           path: '*.tar.gz'
       - name: AWS S3 upload
         if: ${{ github.repository == 'AdaCore/libadalang' }}
diff --git a/utils/gh-build-binaries.sh b/utils/gh-build-binaries.sh
index cf9bbec70..40102922f 100755
--- a/utils/gh-build-binaries.sh
+++ b/utils/gh-build-binaries.sh
@@ -2,6 +2,7 @@
 set -x -e
 DEBUG=$1  # Value is '' or 'debug'
 RUNNER_OS=$2  #  ${{ runner.os }} is Linux, Windiws, maxOS
+CROSS=$3 # '' for native, aarch64 for ARM cross
 export prefix=/tmp/ADALIB_DIR
 export CPATH=/usr/local/include
 export LIBRARY_PATH=/usr/local/lib
@@ -23,6 +24,9 @@ pip install langkit/
 eval `langkit/manage.py setenv | grep -v ^PATH=`
 alr --non-interactive get xmlada
 
+TARGET=${CROSS:+$CROSS-linux} # '' or aarch64-linux
+TARGET_OPTION=${TARGET:+--target=$TARGET}  # '' or --target=aarch64-linux
+
 build_archive()
 {
   LIBRARY_TYPE=$1
@@ -30,42 +34,47 @@ build_archive()
   cd xmlada*
   ./configure --prefix=$prefix ${DEBUG:+--enable-build=Debug}
   make $LIBRARY_TYPE install-$LIBRARY_TYPE \
-    GPRBUILD_OPTIONS="-cargs -g1 -gnatwn -gargs"
+    GPRBUILD_OPTIONS="-cargs -g1 -gnatwn -gargs $TARGET_OPTION"
   cd ..
 
   make -C gprbuild prefix=$prefix BUILD=${DEBUG:-production} \
-    GPRBUILD_OPTIONS="-cargs:C -Dst_mtim=st_mtimespec -gargs" \
+    GPRBUILD_OPTIONS="-cargs:C -Dst_mtim=st_mtimespec -gargs $TARGET_OPTION" \
     libgpr.build.$2 libgpr.install.$2
 
   BUILD=`echo $DEBUG| tr [a-z] [A-Z]`  # Convert to uppercase
 
   make -C gnatcoll-core prefix=$prefix BUILD=${BUILD:-PROD} LIBRARY_TYPES=$LIBRARY_TYPE \
-    GPRBUILD_OPTIONS="-cargs -g1 -gargs" build install
-  ADAFLAGS=-g1 CFLAGS=-g1 python gnatcoll-bindings/iconv/setup.py build ${DEBUG:+--debug} -j0 --prefix=$prefix --library-types=$LIBRARY_TYPE
+    GPRBUILD_OPTIONS="-cargs -g1 -gargs" ${TARGET:+TARGET=$TARGET} build install
+  ADAFLAGS=-g1 CFLAGS=-g1 python gnatcoll-bindings/iconv/setup.py build \
+    ${DEBUG:+--debug} -j0 --prefix=$prefix --library-types=$LIBRARY_TYPE $TARGET_OPTION
   python gnatcoll-bindings/iconv/setup.py install
-  ADAFLAGS=-g1 CFLAGS=-g1 python gnatcoll-bindings/gmp/setup.py build ${DEBUG:+--debug} -j0 --prefix=$prefix --library-types=$LIBRARY_TYPE
+  ADAFLAGS=-g1 CFLAGS=-g1 python gnatcoll-bindings/gmp/setup.py build \
+    ${DEBUG:+--debug} -j0 --prefix=$prefix --library-types=$LIBRARY_TYPE $TARGET_OPTION
   python gnatcoll-bindings/gmp/setup.py install
 
   BUILD=${DEBUG:+dev}  # Convert debug to dev
 
   sed -i -e 's/, "-flto"//' langkit/langkit/adasat/adasat.gpr # LTO fails on GNAT from Alire
-  gprbuild -p -P langkit/langkit/adasat/adasat.gpr -XLIBRARY_TYPE=$LIBRARY_TYPE -XBUILD_MODE=${BUILD:-prod}
+  gprbuild -p -P langkit/langkit/adasat/adasat.gpr -XLIBRARY_TYPE=$LIBRARY_TYPE -XBUILD_MODE=${BUILD:-prod} $TARGET_OPTION
   gprinstall -p -P langkit/langkit/adasat/adasat.gpr -XLIBRARY_TYPE=$LIBRARY_TYPE -XBUILD_MODE=${BUILD:-prod} --prefix=$prefix
 
-  langkit/manage.py build-langkit-support --library-types=$LIBRARY_TYPE --build-mode ${BUILD:-prod}
+  langkit/manage.py build-langkit-support --library-types=$LIBRARY_TYPE --build-mode ${BUILD:-prod} --gargs="$TARGET_OPTION"
   langkit/manage.py install-langkit-support $prefix --library-types=$LIBRARY_TYPE --build-mode ${BUILD:-prod}
 
   make -C gpr2 setup prefix=$prefix GPR2_BUILD=${DEBUG:-release} \
-    GPRBUILD_OPTIONS="-cargs -g1 -gargs" GPR2KBDIR=./gprconfig_kb/db \
+    GPRBUILD_OPTIONS="-cargs -g1 -gargs $TARGET_OPTION" GPR2KBDIR=./gprconfig_kb/db \
     build-lib-$LIBRARY_TYPE install-lib-$LIBRARY_TYPE
   # Build libadalang static library
   ./manage.py generate
 
   GPR_PROJECT_PATH=$prefix/share/gpr \
-  ./manage.py build --disable-all-mains --library-types=$LIBRARY_TYPE --build-mode ${BUILD:-prod} --disable-java
+  ./manage.py build --disable-all-mains --library-types=$LIBRARY_TYPE \
+  --build-mode ${BUILD:-prod} --disable-java --gargs="$TARGET_OPTION"
+
+  ./manage.py install --disable-all-mains --library-types=$LIBRARY_TYPE \
+  --build-mode ${BUILD:-prod} $prefix
 
-  ./manage.py install --disable-all-mains --library-types=$LIBRARY_TYPE --build-mode ${BUILD:-prod} $prefix
-  tar czf libadalang-$RUNNER_OS-`basename $GITHUB_REF`${DEBUG:+-dbg}-$LIBRARY_TYPE.tar.gz -C $prefix .
+  tar czf libadalang-$RUNNER_OS-`basename $GITHUB_REF`${CROSS:+-$CROSS}${DEBUG:+-dbg}-$LIBRARY_TYPE.tar.gz -C $prefix .
 }
 
 # Disable SAL for static libadalang library