diff --git a/_in_container_build.sh b/_in_container_build.sh
index 759c0ad..9e380e7 100755
--- a/_in_container_build.sh
+++ b/_in_container_build.sh
@@ -170,7 +170,10 @@ for TARGET in $TARGETS; do
       echo "Linting config for $TARGET to config_${VERSION}_${TARGET}.linted"
       make -C /app/linux/$VERSION ARCH=${short_arch} CROSS_COMPILE=$(get_cc $TARGET $VERSION) O=/tmp/build/${VERSION}/${TARGET}/ savedefconfig
       cp "/tmp/build/${VERSION}/${TARGET}/defconfig" "/app/config_${VERSION}_${TARGET}.linted"
-      diff -u <(sort /tmp/build/${VERSION}/${TARGET}/.config) <(sort /tmp/build/${VERSION}/${TARGET}/defconfig | sed '/^[ #]/d')
+      # Informational only: savedefconfig prunes defaults/dupes so the configs
+      # always differ. Don't let the non-zero exit abort the (set -e) loop, or
+      # only the first target ever gets linted in a multi-target --config-only run.
+      diff -u <(sort /tmp/build/${VERSION}/${TARGET}/.config) <(sort /tmp/build/${VERSION}/${TARGET}/defconfig | sed '/^[ #]/d') || true
     else
       echo "Building kernel for $TARGET"
       # 2. Inject missing label for x86_64 R_X86_64_PLT32 backport bug
diff --git a/build.sh b/build.sh
index 7987966..3b844ac 100755
--- a/build.sh
+++ b/build.sh
@@ -147,8 +147,8 @@ fi
 # node-shared path directly.)
 rewrite_mount() {
     local path="$1"
-    if [[ -n "$PENGUIN_HOST_MOUNT_FROM" && -n "$PENGUIN_HOST_MOUNT_TO" \
-          && "$path" == "$PENGUIN_HOST_MOUNT_FROM"* ]]; then
+    if [[ -n "${PENGUIN_HOST_MOUNT_FROM:-}" && -n "${PENGUIN_HOST_MOUNT_TO:-}" \
+          && "$path" == "${PENGUIN_HOST_MOUNT_FROM}"* ]]; then
         printf '%s' "${PENGUIN_HOST_MOUNT_TO}${path#"$PENGUIN_HOST_MOUNT_FROM"}"
     else
         printf '%s' "$path"
diff --git a/configs/4.10/all-common.inc b/configs/4.10/all-common.inc
index 8fd198d..a6b327b 100644
--- a/configs/4.10/all-common.inc
+++ b/configs/4.10/all-common.inc
@@ -38,6 +38,7 @@ CONFIG_CGROUP_NET_PRIO=y
 CONFIG_CGROUP_PIDS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_CMA=y
 CONFIG_CODA_FS=y
 CONFIG_CONFIGFS_FS=y
 CONFIG_CRAMFS=y
@@ -265,6 +266,7 @@ CONFIG_SYN_COOKIES=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSV_FS=y
 CONFIG_TASKSTATS=y
+CONFIG_TIPC=y
 CONFIG_TMPFS=y
 CONFIG_TUN=y
 CONFIG_UDF_FS=y
diff --git a/configs/6.13/all-common.inc b/configs/6.13/all-common.inc
index fff1110..4c71df9 100644
--- a/configs/6.13/all-common.inc
+++ b/configs/6.13/all-common.inc
@@ -31,6 +31,7 @@ CONFIG_CGROUP_NET_PRIO=y
 CONFIG_CGROUP_PIDS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_CHECKPOINT_RESTORE=y
+CONFIG_CMA=y
 CONFIG_CODA_FS=y
 CONFIG_CONFIGFS_FS=y
 CONFIG_CRAMFS=y
@@ -274,6 +275,7 @@ CONFIG_SYN_COOKIES=y
 CONFIG_SYSVIPC=y
 CONFIG_SYSV_FS=y
 CONFIG_TASKSTATS=y
+CONFIG_TIPC=y
 CONFIG_TMPFS=y
 CONFIG_TUN=y
 CONFIG_UDF_FS=y