diff --git a/src/dropshell-build b/src/dropshell-build
index c79dd12..e67269d 100755
--- a/src/dropshell-build
+++ b/src/dropshell-build
@@ -35,6 +35,11 @@ function version() {
     echo "2025.0531.0942"
 }
 
+function die() {
+    echo "Error: $*"
+    exit 1
+}
+
 
 # ----------------------------------------------------------------------------------------------------------
 # BUILD
diff --git a/src/dropshell-build-install-requirements b/src/dropshell-build-install-requirements
index 37065de..39d0b9b 100755
--- a/src/dropshell-build-install-requirements
+++ b/src/dropshell-build-install-requirements
@@ -77,14 +77,32 @@ function install_packages() {
 
     # Define packages based on distribution
     case $OS in
-        "Ubuntu"|"Debian GNU/Linux")
+        "Ubuntu")
             # Common packages for both Ubuntu and Debian
-            PACKAGES="build-essential cmake git wget tar curl ninja-build mold nodejs npm perl jq ccache upx-ucl"
+            PACKAGES="build-essential cmake git wget tar curl ninja-build mold nodejs npm perl jq ccache upx-ucl nlohmann-json3-dev"
             INSTALLCMD="apt-get install -y" 
             UPDATECMD="apt-get update"
             ;;
+        "Debian GNU/Linux")
+            PACKAGES="build-essential cmake git wget tar curl ninja-build mold nodejs npm perl jq ccache upx-ucl nlohmann-json3-dev"
+            INSTALLCMD="apt-get install -y" 
+            UPDATECMD="apt-get update"
+
+            # special case for debian 12
+            if ! is_package_installed "upx-ucl"; then
+                # get from testing.
+                # Add testing repo temporarily
+                echo "deb http://deb.debian.org/debian testing main" | ${SUDOCMD:-} tee /etc/apt/sources.list.d/testing-temp.list
+                # Update package lists
+                ${SUDOCMD:-} bash -c "apt-get update"
+                ${SUDOCMD:-} bash -c "apt-get -t testing install -y upx-ucl"
+                ${SUDOCMD:-} bash -c "rm /etc/apt/sources.list.d/testing-temp.list"
+                ${SUDOCMD:-} bash -c "apt-get update"
+                HAVE_UPDATED=1
+            fi
+            ;;            
         "Alpine Linux")
-            PACKAGES="build-base cmake git wget tar curl ninja mold nodejs npm linux-headers perl jq ccache upx"
+            PACKAGES="build-base cmake git wget tar curl ninja mold nodejs npm linux-headers perl jq ccache upx nlohmann-json-dev"
             INSTALLCMD="apk add --no-cache"
             UPDATECMD="apk update"
             ;;
@@ -304,7 +322,6 @@ function install_musl() {
     TOOLCHAIN_LIST=(
         "aarch64-linux-musl-cross"
         "x86_64-linux-musl-cross"
-        "x86_64-w64-mingw32-cross"
     )
 
     for TOOLCHAIN in "${TOOLCHAIN_LIST[@]}"; do