bin/nixenvironment in nixenvironment-0.0.12 vs bin/nixenvironment in nixenvironment-0.0.13

@@ -346,16 +346,24 @@
 end
 
 def build(config, ipa)
   build = File.join(BUILD_SCRIPTS_PATH, 'Build.py')
 
-  build_success = system("#{build} --project \"#{@config['PROJECT_TO_BUILD']}\"\
-                                   --target \"#{@config['PROJECT_TARGET_TO_BUILD']}\"\
-                                   --workspace \"#{@config['WORKSPACE_TO_BUILD']}\"\
-                                   --scheme \"#{@config['WORKSPACE_SCHEME_TO_BUILD']}\"\
-                                   --configuration \"#{config}\"\
-                                   --sdk \"#{@config['SDK']}\"\
-                                   --env-var-prefix \"#{@config['ENV_VAR_PREFIX']}\"")
+  build_success = nil
+
+  if @config['PROJECT_TO_BUILD'] and @config['PROJECT_TO_BUILD'].length > 0
+    build_success = system("#{build} --project \"#{@config['PROJECT_TO_BUILD']}\"\
+                                     --target \"#{@config['PROJECT_TARGET_TO_BUILD']}\"\
+                                     --configuration \"#{config}\"\
+                                     --sdk \"#{@config['SDK']}\"\
+                                     --env-var-prefix \"#{@config['ENV_VAR_PREFIX']}\"")
+  elsif @config['WORKSPACE_TO_BUILD'] and @config['WORKSPACE_TO_BUILD'].length > 0
+    build_success = system("#{build} --workspace \"#{@config['WORKSPACE_TO_BUILD']}\"\
+                                     --scheme \"#{@config['WORKSPACE_SCHEME_TO_BUILD']}\"\
+                                     --configuration \"#{config}\"\
+                                     --sdk \"#{@config['SDK']}\"\
+                                     --env-var-prefix \"#{@config['ENV_VAR_PREFIX']}\"")
+  end
 
   unless build_success
     revert_info_plist
     abort('Build error!')
   end