diff --git a/pyro/Application.py b/pyro/Application.py
index ceabc155..e26c2f05 100644
--- a/pyro/Application.py
+++ b/pyro/Application.py
@@ -56,7 +56,8 @@ def _try_fix_input_path(input_path: str) -> str:
 
     @staticmethod
     def _validate_project_file(ppj: PapyrusProject):
-        if ppj.imports_node is None:
+        if ppj.imports_node is None and \
+                (ppj.scripts_node is not None or ppj.folders_node is not None):
             Application.log.error('Cannot proceed without imports defined in project')
             sys.exit(1)
 
@@ -108,7 +109,7 @@ def run(self) -> int:
 
         self._validate_project_file(ppj)
 
-        if ppj.scripts_node or ppj.folders_node or ppj.remote_paths:
+        if ppj.scripts_node is not None or ppj.folders_node is not None or ppj.remote_paths:
             ppj.try_initialize_remotes()
 
             if ppj.use_pre_import_event:
@@ -161,7 +162,7 @@ def run(self) -> int:
             else:
                 Application.log.error(f'Cannot create Packages because {build.compile_data.failed_count} scripts failed to compile')
                 sys.exit(build.compile_data.failed_count)
-        else:
+        elif ppj.packages_node is not None:
             Application.log.info('Cannot create Packages because Package is disabled in project')
 
         if ppj.options.zip:
@@ -170,15 +171,17 @@ def run(self) -> int:
             else:
                 Application.log.error(f'Cannot create ZipFile because {build.compile_data.failed_count} scripts failed to compile')
                 sys.exit(build.compile_data.failed_count)
-        else:
+        elif ppj.zip_files_node is not None:
             Application.log.info('Cannot create ZipFile because Zip is disabled in project')
 
         if build.scripts_count > 0:
             Application.log.info(build.compile_data.to_string() if build.compile_data.success_count > 0 else 'No scripts were compiled.')
 
-        Application.log.info(build.package_data.to_string() if build.package_data.file_count > 0 else 'No files were packaged.')
+        if ppj.packages_node is not None:
+            Application.log.info(build.package_data.to_string() if build.package_data.file_count > 0 else 'No files were packaged.')
 
-        Application.log.info(build.zipping_data.to_string() if build.zipping_data.file_count > 0 else 'No files were zipped.')
+        if ppj.zip_files_node is not None:
+            Application.log.info(build.zipping_data.to_string() if build.zipping_data.file_count > 0 else 'No files were zipped.')
 
         Application.log.info('DONE!')
 
diff --git a/pyro/Enums/ZipCompression.py b/pyro/Enums/ZipCompression.py
index 3177d739..7a4c8796 100644
--- a/pyro/Enums/ZipCompression.py
+++ b/pyro/Enums/ZipCompression.py
@@ -1,15 +1,13 @@
-from enum import Enum
-
-
-class ZipCompression(Enum):
+class ZipCompression:
     STORE = 0
     DEFLATE = 8
+    MAP = {'STORE': 0, 'DEFLATE': 8}
 
-    @classmethod
-    def _missing_(cls, value):
+    @staticmethod
+    def get(value: str) -> int:
         try:
-            return cls[value.upper()]
+            return ZipCompression.MAP[value.upper()]
         except KeyError:
             pass
 
-        raise ValueError("%r is not a valid %s" % (value, cls.__name__))
+        raise ValueError("%s is not a valid key" % value.upper())
diff --git a/pyro/PackageManager.py b/pyro/PackageManager.py
index f35f1f2c..8f94dd5b 100644
--- a/pyro/PackageManager.py
+++ b/pyro/PackageManager.py
@@ -324,13 +324,11 @@ def create_zip(self) -> None:
 
             self._check_write_permission(file_path)
 
-            try:
-                if self.options.zip_compression in ('store', 'deflate'):
-                    compress_type = ZipCompression[self.options.zip_compression]
-                else:
-                    compress_type = ZipCompression[zip_node.get(XmlAttributeName.COMPRESSION)]
-            except KeyError:
-                compress_type = ZipCompression.STORE
+            if self.options.zip_compression in ('store', 'deflate'):
+                compress_type = ZipCompression.get(self.options.zip_compression)
+            else:
+                compress_str = zip_node.get(XmlAttributeName.COMPRESSION)
+                compress_type = ZipCompression.get(compress_str)
 
             root_dir: str = self.ppj._get_path(zip_node.get(XmlAttributeName.ROOT_DIR),
                                                relative_root_path=self.ppj.project_path,
@@ -340,7 +338,7 @@ def create_zip(self) -> None:
                 PackageManager.log.info(f'Creating "{attr_file_name}"...')
 
                 try:
-                    with zipfile.ZipFile(file_path, mode='w', compression=compress_type.value) as z:
+                    with zipfile.ZipFile(file_path, mode='w', compression=compress_type) as z:
                         for include_path, attr_path in self._generate_include_paths(zip_node, root_dir, True):
                             if not attr_path:
                                 if root_dir in include_path:
@@ -353,7 +351,7 @@ def create_zip(self) -> None:
                                 arcname = attr_file_name if attr_path == os.curdir else os.path.join(attr_path, attr_file_name)
 
                             PackageManager.log.info('+ "{}"'.format(arcname))
-                            z.write(include_path, arcname, compress_type=compress_type.value)
+                            z.write(include_path, arcname, compress_type=compress_type)
 
                             self.includes += 1