diff --git a/releases/weekly/specs/ia64/stage1.spec b/releases/weekly/specs/ia64/stage1.spec
index c02cc2d2..d2bccc9e 100644
--- a/releases/weekly/specs/ia64/stage1.spec
+++ b/releases/weekly/specs/ia64/stage1.spec
@@ -6,4 +6,6 @@ profile: default/linux/ia64/17.0
 snapshot: latest
 source_subpath: default/stage3-ia64-latest
 update_seed: yes
+update_seed_command: --update --deep @world
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
+portage_prefix: releng
diff --git a/releases/weekly/specs/ia64/stage2.spec b/releases/weekly/specs/ia64/stage2.spec
index 63af244c..f4bada36 100644
--- a/releases/weekly/specs/ia64/stage2.spec
+++ b/releases/weekly/specs/ia64/stage2.spec
@@ -6,3 +6,4 @@ profile: default/linux/ia64/17.0
 snapshot: latest
 source_subpath: default/stage1-ia64-latest
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
+portage_prefix: releng
diff --git a/releases/weekly/specs/ia64/stage3.spec b/releases/weekly/specs/ia64/stage3.spec
index fc7aeb91..60b2f96a 100644
--- a/releases/weekly/specs/ia64/stage3.spec
+++ b/releases/weekly/specs/ia64/stage3.spec
@@ -6,3 +6,4 @@ profile: default/linux/ia64/17.0
 snapshot: latest
 source_subpath: default/stage1-ia64-latest
 portage_confdir: @REPO_DIR@/releases/weekly/portage/stages
+portage_prefix: releng