diff --git a/src/main/python/ddadevops/release_mixin.py b/src/main/python/ddadevops/release_mixin.py
index 597ee6a..22446c9 100644
--- a/src/main/python/ddadevops/release_mixin.py
+++ b/src/main/python/ddadevops/release_mixin.py
@@ -2,29 +2,29 @@ from pybuilder.core import Project
 from src.main.python.ddadevops.devops_build import DevopsBuild
 from src.main.python.ddadevops.infrastructure.release_mixin import ReleaseContextRepository, ReleaseTypeRepository, VersionRepository, GitApi, EnvironmentApi
 from src.main.python.ddadevops.application import PrepareReleaseService, TagAndPushReleaseService
-from src.main.python.ddadevops.domain import Release, EnvironmentKeys
+from src.main.python.ddadevops.domain import Release, EnvironmentKeys, MixinType
 
 class ReleaseMixin(DevopsBuild):
-    def __init__(self, project: Project, release: Release):
-        super().__init__(project, devops=release.devops)
-        self.repo.set_release(self.project, release)
-        self.main_branch = release.main_branch
-
+    def __init__(self, project: Project, input: dict):
+        super().__init__(project, input)
+        devops = self.repo.get_devops(self.project)
         git_api = GitApi()
+        self.tag_and_push_release_service = TagAndPushReleaseService(git_api)
         environment_api = EnvironmentApi()
+        if MixinType.RELEASE not in devops.mixins:
+            raise ValueError(f"ReleaseMixin requires MixinType.RELEASE")
+
+        # TODO: move this to service
         env_key = EnvironmentKeys.DDADEVOPS_RELEASE_TYPE.name
         environment_val_set = environment_api.get(env_key) != "" and environment_api.get(env_key) is not None
-
         if environment_val_set:
             release_type_repo = ReleaseTypeRepository.from_environment(environment_api)
         else:
             release_type_repo = ReleaseTypeRepository.from_git(git_api)
-
         version_repo = VersionRepository(release.config_file)
         self.release_repo = ReleaseContextRepository(version_repo, release_type_repo)
-
+        # Here the initialization can happen
         self.prepare_release_service = PrepareReleaseService()
-        self.tag_and_push_release_service = TagAndPushReleaseService(git_api)
 
     def prepare_release(self):
         release = self.release_repo.get_release(self.main_branch)