diff --git a/setup.py b/setup.py
index d8998b6958..cb98090f72 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,6 @@ sys.path.append(str(Path.cwd() / 'src'))
 
 
 def _CustomBuild(*args, **kwargs):
-    print(sys.path)
     from pretix._build import CustomBuild
     return CustomBuild(*args, **kwargs)
 
diff --git a/src/pretix/_build.py b/src/pretix/_build.py
index f64f0f0c99..6a95066717 100644
--- a/src/pretix/_build.py
+++ b/src/pretix/_build.py
@@ -45,6 +45,10 @@ def npm_install():
 
 class CustomBuild(build):
     def run(self):
+        if "pretix" not in os.listdir("."):
+            # Only run this command on the pretix module, not on other modules even if it's registered globally
+            # in some cases
+            return build.run(self)
         if "PRETIX_DOCKER_BUILD" in os.environ:
             return  # this is a hack to allow calling this file early in our docker build to make use of caching
         os.environ.setdefault("DJANGO_SETTINGS_MODULE", "pretix._build_settings")
@@ -68,6 +72,10 @@ class CustomBuild(build):
 
 class CustomBuildExt(build_ext):
     def run(self):
+        if "pretix" not in os.listdir("."):
+            # Only run this command on the pretix module, not on other modules even if it's registered globally
+            # in some cases
+            return build_ext.run(self)
         if "PRETIX_DOCKER_BUILD" in os.environ:
             return  # this is a hack to allow calling this file early in our docker build to make use of caching
         npm_install()