diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.8.0.2 — 2026-10-06
+
+### Fixed
+
+- Pin bare-database fixtures to the same stable effective-uid temporary root owned by `mori://shinzui/keiro/packages/keiro-test-support` as the delegated migrated fixtures; keep stale-instance sweeping enabled and require `mori://shinzui/ephemeral-pg/packages/ephemeral-pg` >=0.3.1 && <0.4.
+
 ## [Unreleased]
 
 ## 0.8.0.1 — 2026-10-05
diff --git a/kioku-migrations.cabal b/kioku-migrations.cabal
--- a/kioku-migrations.cabal
+++ b/kioku-migrations.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: kioku-migrations
-version: 0.8.0.1
+version: 0.8.0.2
 synopsis: Schema migrations for kioku
 description:
   Owns kioku schema evolution as a native pg-migrate component and composes
@@ -86,10 +86,12 @@
   exposed-modules: Kioku.Migrations.TestSupport
   build-depends:
     base >=4.18 && <5,
-    ephemeral-pg ^>=0.3.1.0,
+    directory >=1.3 && <1.4,
+    ephemeral-pg >=0.3.1 && <0.4,
     keiro-test-support ^>=0.19.0.0,
-    kioku-migrations ^>=0.8.0.1,
+    kioku-migrations ^>=0.8.0.2,
     text >=2.0 && <2.2,
+    unix >=2.8 && <2.9,
 
 test-suite kioku-migrations-test
   import: warnings, shared
@@ -110,7 +112,7 @@
     containers >=0.6 && <0.8,
     hasql >=1.6,
     keiro-migrations ^>=0.19.0.0,
-    kioku-migrations ^>=0.8.0.1,
+    kioku-migrations ^>=0.8.0.2,
     kioku-migrations:test-support,
     kiroku-store-migrations ^>=0.6.0.0,
     pg-migrate ^>=1.2.0.0,
diff --git a/test-support/Kioku/Migrations/TestSupport.hs b/test-support/Kioku/Migrations/TestSupport.hs
--- a/test-support/Kioku/Migrations/TestSupport.hs
+++ b/test-support/Kioku/Migrations/TestSupport.hs
@@ -4,10 +4,13 @@
   )
 where
 
+import Data.Monoid (Last (..))
 import Data.Text (Text)
 import EphemeralPg qualified
 import Keiro.Test.Postgres qualified as Keiro
 import Kioku.Migrations (kiokuMigrations)
+import System.Directory (createDirectoryIfMissing)
+import System.Posix.User (getEffectiveUserID)
 
 withKiokuMigratedDatabase :: (Text -> IO a) -> IO a
 withKiokuMigratedDatabase use = do
@@ -21,5 +24,12 @@
 -- against) start from here.
 withBareDatabase :: (Text -> IO a) -> IO a
 withBareDatabase use = do
-  result <- EphemeralPg.with (use . EphemeralPg.connectionString)
+  -- Migrated fixtures delegate to mori://shinzui/keiro/packages/keiro-test-support.
+  -- Share its stable per-user root so either fixture sweeps abandoned clusters
+  -- from earlier runs, including runs under a different shell's TMPDIR.
+  uid <- getEffectiveUserID
+  let root = "/tmp/ephpg-keiro-" <> show uid
+  createDirectoryIfMissing True root
+  let config = EphemeralPg.defaultConfig {EphemeralPg.temporaryRoot = Last (Just root)}
+  result <- EphemeralPg.withConfig config (use . EphemeralPg.connectionString)
   either (fail . show) pure result