diff --git a/Dockerfile b/Dockerfile
index 1c46c39..fd7f140 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -34,8 +34,8 @@ RUN echo "BLENDER_FULL_VERSION: $BLENDER_FULL_VERSION" && \
 ENV PATH="$PATH:/blender-$BLENDER_FULL_VERSION-linux-x64"
 
 # Add custom scripts
-COPY scripts/activate.sh /activate.sh
-RUN chmod +x /activate.sh 
+COPY scripts/build.sh /build.sh
+RUN chmod +x /build.sh 
 
 # Done
 ENTRYPOINT [ "/entrypoint.sh" ]
\ No newline at end of file
diff --git a/scripts/activate.sh b/scripts/activate.sh
deleted file mode 100755
index aa103b6..0000000
--- a/scripts/activate.sh
+++ /dev/null
@@ -1,29 +0,0 @@
-#!/usr/bin/env bash
-
-# Convert the UNITY_LICENSE to a UNITY_SERIAL
-if [ -z "$UNITY_SERIAL" ] && [ ! -z "$UNITY_LICENSE" ]; then
-    echo "Extracting serial from license file"
-    UNITY_SERIAL=$(echo "$UNITY_LICENSE" | grep -oP '(?<=<DeveloperData Value=")[^"]+' || echo "")
-    if [ ! -z "$UNITY_SERIAL" ]; then
-        echo "Found serial in license file"
-    fi
-
-    echo "$UNITY_SERIAL" | base64 -d >/tmp/serial_decoded
-    UNITY_SERIAL=$(dd if=/tmp/serial_decoded bs=1 skip=4 2>/dev/null)
-    rm /tmp/serial_decoded
-fi
-export UNITY_SERIAL="$UNITY_SERIAL"
-
-# Activate the script.
-if [ "$SKIP_ACTIVATION" != "true" ]; then
-  source /steps/activate.sh
-
-  # If we didn't activate successfully, exit with the exit code from the activation step.
-  if [[ $UNITY_EXIT_CODE -ne 0 ]]; then
-    exit $UNITY_EXIT_CODE
-  fi
-
-  export SKIP_ACTIVATION="true"
-else
-  echo "Skipping activation"
-fi
\ No newline at end of file
diff --git a/scripts/build.sh b/scripts/build.sh
new file mode 100755
index 0000000..e186506
--- /dev/null
+++ b/scripts/build.sh
@@ -0,0 +1,96 @@
+#!/usr/bin/env bash
+
+set_env_var() {
+    local name="$1"
+    local value="$2"
+    export "$name=$value"
+    echo "$name=$value" >> $GITHUB_ENV
+}
+
+# Convert the UNITY_LICENSE to a UNITY_SERIAL
+if [ -z "$UNITY_SERIAL" ] && [ ! -z "$UNITY_LICENSE" ]; then
+    echo "Extracting serial from license file"
+    UNITY_SERIAL=$(echo "$UNITY_LICENSE" | grep -oP '(?<=<DeveloperData Value=")[^"]+' || echo "")
+    if [ ! -z "$UNITY_SERIAL" ]; then
+        echo "Found serial in license file"
+    fi
+
+    echo "$UNITY_SERIAL" | base64 -d >/tmp/serial_decoded
+    UNITY_SERIAL=$(dd if=/tmp/serial_decoded bs=1 skip=4 2>/dev/null)
+    rm /tmp/serial_decoded
+    
+    set_env_var "UNITY_SERIAL" $UNITY_SERIAL
+fi
+
+# Extract the android keystore file
+if [ ! -z "$ANDROID_KEYSTORE_BASE64" ]; then
+    if [ -z "$ANDROID_KEYSTORE_NAME" ]; then
+        echo "ANDROID_KEYSTORE_NAME not set, using default keystore.jks"
+        ANDROID_KEYSTORE_NAME="keystore.jks"
+    else
+        echo "Using custom keystore name: $ANDROID_KEYSTORE_NAME"
+    fi
+
+    echo "Storing keystore file to $ANDROID_KEYSTORE_NAME"
+    set_env_var "ANDROID_KEYSTORE_NAME" $ANDROID_KEYSTORE_NAME
+fi
+
+# Set a bunch of defaults
+if [ -z "$PROJECT_PATH" ]; then
+    PROJECT_PATH="."
+    set_env_var "PROJECT_PATH" $PROJECT_PATH
+fi
+echo "PROJECT PATH: $PROJECT_PATH"
+
+if [ -z "$SKIP_ACTIVATION" ]; then
+    SKIP_ACTIVATION="false"
+    set_env_var "SKIP_ACTIVATION" $SKIP_ACTIVATION
+fi
+echo "SKIP_ACTIVATION: $SKIP_ACTIVATION"
+
+if [ -z "$MANUAL_EXIT" ]; then
+    MANUAL_EXIT="false"
+    set_env_var "MANUAL_EXIT" $MANUAL_EXIT
+fi
+echo "MANUAL_EXIT: $MANUAL_EXIT"
+
+if [ -z "$ENABLE_GPU" ]; then
+    ENABLE_GPU="false"
+    set_env_var "ENABLE_GPU" $ENABLE_GPU
+fi
+echo "ENABLE_GPU: $ENABLE_GPU"
+
+if [ -z "$ENABLE_GRAPHICS" ]; then
+    ENABLE_GRAPHICS="false"
+    set_env_var "ENABLE_GRAPHICS" $ENABLE_GRAPHICS
+fi
+echo "ENABLE_GRAPHICS: $ENABLE_GRAPHICS"
+
+# Android Defaults
+if [ -z "$ANDROID_VERSION_CODE" ]; then
+    ANDROID_VERSION_CODE="129"
+    set_env_var "ANDROID_VERSION_CODE" $ANDROID_VERSION_CODE
+fi
+echo "ANDROID_VERSION_CODE: $ANDROID_VERSION_CODE"
+
+if [ -z "$ANDROID_EXPORT_TYPE" ]; then
+    ANDROID_EXPORT_TYPE="androidPackage"
+    set_env_var "ANDROID_EXPORT_TYPE" $ANDROID_EXPORT_TYPE
+fi
+echo "ANDROID_EXPORT_TYPE: $ANDROID_EXPORT_TYPE"
+
+if [ -z "$ANDROID_SYMBOL_TYPE" ]; then
+    ANDROID_SYMBOL_TYPE="none"
+    set_env_var "ANDROID_SYMBOL_TYPE" $ANDROID_SYMBOL_TYPE
+fi
+echo "ANDROID_SYMBOL_TYPE: $ANDROID_SYMBOL_TYPE"
+
+# Configure the final custom parameters
+CUSTOM_PARAMETERS="$CUSTOM_PARAMETERS"
+if [ "$ENABLE_GRAPHICS" = "false" ]; then
+    CUSTOM_PARAMETERS="$CUSTOM_PARAMETERS -nographics"
+fi
+set_env_var "CUSTOM_PARAMETERS" $CUSTOM_PARAMETERS
+
+# Run the build
+source /entrypoint.sh
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