diff --git a/.gitignore b/.gitignore
index a87329f..9cdc82d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@ demos/
 *.log
 *.log.???
 missingasset.csv
+*.iwd
diff --git a/build_iwd.sh b/build_iwd.sh
new file mode 100644
index 0000000..fb3d722
--- /dev/null
+++ b/build_iwd.sh
@@ -0,0 +1,31 @@
+if [ -z "${WORKSPACE}"]; then
+	export WORKSPACE="$(pwd)"
+fi
+
+iwd_files()
+{
+	find "${WORKSPACE}/" -type f \
+		! -path "*.git*" \
+		! -name "README*" \
+		! -name "mod.ff" \
+		! -name "mod.csv" \
+		! -name "missingasset.csv" \
+		! -name "*.md" \
+		! -name "*.log*" \
+		! -path "*/demos/**" \
+		! -name "*.sh" \
+		! -name "*.iwd" |\
+		sed "s:${WORKSPACE}/::g"
+}
+
+gen_iwd_filelist()
+{
+	iwd_filelist="$(mktemp)"
+	iwd_files > "$iwd_filelist"
+	echo $iwd_filelist
+}
+
+iwd_filelist="$(gen_iwd_filelist)"
+rm -f "z_svr_hns.iwd"
+7z a -tzip -mx9 "z_svr_hns.iwd" @"$iwd_filelist"
+rm -f "$iwd_filelist"