diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index c3c4de9..170c27c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -31,11 +31,22 @@ jobs:
       run: |
         mkdir dist
         sudo apt-get update -y
+
         bash ./build-engine.sh release
         tar -a -cf dist/spidermonkey-wasm-static-lib_release.tar.gz release
         rm -rf release obj-release
+
+        bash ./build-engine.sh release weval
+        tar -a -cf dist/spidermonkey-wasm-static-lib_release_weval.tar.gz release-weval
+        rm -rf release-weval obj-release-weval
+
         bash ./build-engine.sh debug
         tar -a -cf dist/spidermonkey-wasm-static-lib_debug.tar.gz debug
+        rm -rf debug obj-debug
+
+        bash ./build-engine.sh debug weval
+        tar -a -cf dist/spidermonkey-wasm-static-lib_debug_weval.tar.gz debug-weval
+        rm -rf debug-weval obj-debug-weval
 
     - name: Calculate tag name
       run: |
diff --git a/build-engine.sh b/build-engine.sh
index 7541a81..1ab0083 100755
--- a/build-engine.sh
+++ b/build-engine.sh
@@ -7,9 +7,13 @@ working_dir="$(pwd)"
 script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
 
 mode="${1:-release}"
-mozconfig="${working_dir}/mozconfig-${mode}"
-objdir="obj-$mode"
-outdir="$mode"
+weval=""
+if [[ $# > 1 ]] && [[ "$2" == "weval" ]]; then
+    weval=-weval
+fi
+mozconfig="${working_dir}/mozconfig-${mode}${weval}"
+objdir="obj-$mode${weval}"
+outdir="$mode${weval}"
 rebuild="${REBUILD_ENGINE:-0}"
 
 cat << EOF > "$mozconfig"
@@ -63,6 +67,15 @@ case "$mode" in
     ;;
 esac
 
+case "$weval" in
+  -weval)
+    echo "ac_add_options --enable-portable-baseline-interp-force" >> "$mozconfig"
+    echo "ac_add_options --enable-aot-ics" >> "$mozconfig"
+    echo "ac_add_options --enable-aot-ics-force" >> "$mozconfig"
+    echo "ac_add_options --enable-pbl-weval" >> "$mozconfig"
+    ;;
+esac
+
 # For a full build (not a rebuild), we need to clone the repo and do some setup work.
 # `rebuild.sh` invokes this script with REBUILD_ENGINE=1 which sets rebuild=1
 # and skips this setup.
diff --git a/download-engine.sh b/download-engine.sh
index 7286137..0342827 100755
--- a/download-engine.sh
+++ b/download-engine.sh
@@ -12,9 +12,14 @@ if [[ $1 == "debug" ]]
 then
   mode="debug"
 fi
+weval=""
+if [[ $2 == "weval" ]]
+then
+    weval="_weval"
+fi
 
 git_rev="$(git -C "$script_dir" rev-parse HEAD)"
-file="spidermonkey-wasm-static-lib_${mode}.tar.gz"
+file="spidermonkey-wasm-static-lib_${mode}${weval}.tar.gz"
 bundle_url="${gh_url}/releases/download/rev_${git_rev}/${file}"
 
 curl --fail -L -O "$bundle_url"