diff --git a/deploy/homologacao/pipeline.py b/deploy/homologacao/pipeline.py
index bcd84819..760fb7de 100644
--- a/deploy/homologacao/pipeline.py
+++ b/deploy/homologacao/pipeline.py
@@ -256,6 +256,8 @@ class Delivery:
             return {'status':'already_installed','commit':target}
         refuse_drift(self.current.resolve(),installed['hashes'])
         self.releases.mkdir(parents=True,exist_ok=True)
+        if shutil.disk_usage(self.releases).free < 5 * 1024**3:
+            raise RuntimeError('Insufficient free space for an isolated build; active release preserved')
         release=self.releases/(target+'-'+uuid.uuid4().hex[:8]);release.mkdir(mode=0o750)
         self.build(target,release)
         if self.latest()!=target: