diff --git a/infra/config/cr-buildbucket.cfg b/infra/config/cr-buildbucket.cfg
index 8d67803df..c2e6177c7 100644
--- a/infra/config/cr-buildbucket.cfg
+++ b/infra/config/cr-buildbucket.cfg
@@ -904,6 +904,9 @@ buckets {
       }
     }
   }
+  constraints {
+    pools: "luci.flex.ci"
+  }
 }
 buckets {
   name: "cron"
@@ -1701,4 +1704,8 @@ buckets {
       }
     }
   }
+  constraints {
+    pools: "luci.flex.try"
+    service_accounts: "libyuv-try-builder@chops-service-accounts.iam.gserviceaccount.com"
+  }
 }
diff --git a/infra/config/main.star b/infra/config/main.star
index 91c67cc7a..8dcc8d9f0 100755
--- a/infra/config/main.star
+++ b/infra/config/main.star
@@ -175,6 +175,9 @@ luci.cq_group(
 
 luci.bucket(
     name = "ci",
+    constraints = luci.bucket_constraints(
+        pools = ["luci.flex.ci"],
+    ),
 )
 luci.bucket(
     name = "try",
@@ -184,6 +187,12 @@ luci.bucket(
             "service-account-cq",
         ]),
     ],
+    constraints = luci.bucket_constraints(
+        pools = ["luci.flex.try"],
+        service_accounts = [
+            "libyuv-try-builder@chops-service-accounts.iam.gserviceaccount.com",
+        ],
+    ),
 )
 luci.bucket(
     name = "cron",