2 files changed, 17 insertions, 0 deletions
diff --git a/image-builder/build-full-image.sh b/image-builder/build-full-image.sh
index 6f88db7..6ca0288 100755
--- a/image-builder/build-full-image.sh
+++ b/image-builder/build-full-image.sh
@@ -225,6 +225,16 @@ DOCKERFILE
         return 1
     fi
 
+    # The rebuild left the previous image untagged but still resident, ~33G for
+    # -current. Waiting for a daily prune means the next variant builds on top
+    # of that dead weight: exporting a 33G image needs its own size again in
+    # transient space, and the volume was short enough that the -current build
+    # failed six nights running with "no space left on device". Drop it here,
+    # while the tag we just pushed is the only one referencing its layers.
+    # Best-effort: a failed prune costs space, not correctness.
+    _log "  Pruning superseded images..."
+    docker image prune -f >/dev/null 2>&1 || _warn "  image prune failed (ignored)"
+
     _log "=== Done: ${FULL_TAG} ==="
 }
 
diff --git a/image-builder/build-sbo-testbuild.sh b/image-builder/build-sbo-testbuild.sh
index 8d08a03..d40ccb1 100755
--- a/image-builder/build-sbo-testbuild.sh
+++ b/image-builder/build-sbo-testbuild.sh
@@ -135,6 +135,13 @@ DOCKERFILE
         _warn "  push failed for ${TB_TAG}."
         return 1
     fi
+
+    # Drop the image this rebuild superseded rather than leaving it resident
+    # until a daily prune; see the same step in build-full-image.sh for why
+    # that mattered. Best-effort: a failed prune costs space, not correctness.
+    _log "  Pruning superseded images..."
+    docker image prune -f >/dev/null 2>&1 || _warn "  image prune failed (ignored)"
+
     _log "=== Done: ${TB_TAG} ==="
 }