diff --git a/config/coreboot/macbook11/target.cfg b/config/coreboot/macbook11/target.cfg
index 1bbaa8fc..117e160d 100644
--- a/config/coreboot/macbook11/target.cfg
+++ b/config/coreboot/macbook11/target.cfg
@@ -4,7 +4,6 @@ arch="x86_32"
 payload_grub="y"
 payload_grub_withseabios="y"
 payload_seabios="y"
-payload_memtest="y"
 grub_scan_disk="ahci"
 microcode_required="n"
 vendorfiles="n"
diff --git a/config/coreboot/t60_16mb_intelgpu/target.cfg b/config/coreboot/t60_16mb_intelgpu/target.cfg
index 91fc7462..8f4eb55e 100644
--- a/config/coreboot/t60_16mb_intelgpu/target.cfg
+++ b/config/coreboot/t60_16mb_intelgpu/target.cfg
@@ -4,7 +4,6 @@ arch="x86_32"
 payload_grub="y"
 payload_grub_withseabios="y"
 payload_seabios="y"
-payload_memtest="y"
 grub_scan_disk="ahci"
 microcode_required="n"
 vendorfiles="n"
diff --git a/config/coreboot/t60_intelgpu/target.cfg b/config/coreboot/t60_intelgpu/target.cfg
index 91fc7462..8f4eb55e 100644
--- a/config/coreboot/t60_intelgpu/target.cfg
+++ b/config/coreboot/t60_intelgpu/target.cfg
@@ -4,7 +4,6 @@ arch="x86_32"
 payload_grub="y"
 payload_grub_withseabios="y"
 payload_seabios="y"
-payload_memtest="y"
 grub_scan_disk="ahci"
 microcode_required="n"
 vendorfiles="n"
diff --git a/config/coreboot/x60/target.cfg b/config/coreboot/x60/target.cfg
index 91fc7462..8f4eb55e 100644
--- a/config/coreboot/x60/target.cfg
+++ b/config/coreboot/x60/target.cfg
@@ -4,7 +4,6 @@ arch="x86_32"
 payload_grub="y"
 payload_grub_withseabios="y"
 payload_seabios="y"
-payload_memtest="y"
 grub_scan_disk="ahci"
 microcode_required="n"
 vendorfiles="n"
diff --git a/config/coreboot/x60_16mb/target.cfg b/config/coreboot/x60_16mb/target.cfg
index 91fc7462..8f4eb55e 100644
--- a/config/coreboot/x60_16mb/target.cfg
+++ b/config/coreboot/x60_16mb/target.cfg
@@ -4,7 +4,6 @@ arch="x86_32"
 payload_grub="y"
 payload_grub_withseabios="y"
 payload_seabios="y"
-payload_memtest="y"
 grub_scan_disk="ahci"
 microcode_required="n"
 vendorfiles="n"
diff --git a/config/memtest86plus/patches/0001-add-central-Makefile-in-main-directory.patch b/config/memtest86plus/patches/0001-add-central-Makefile-in-main-directory.patch
index 7a54c102..8291bfb8 100644
--- a/config/memtest86plus/patches/0001-add-central-Makefile-in-main-directory.patch
+++ b/config/memtest86plus/patches/0001-add-central-Makefile-in-main-directory.patch
@@ -1,39 +1,40 @@
-From 1727cb88a183a9e787e359e42c0a499917ba495b Mon Sep 17 00:00:00 2001
+From 81d850494c3cde1da33cc2df44837c839c1f2c60 Mon Sep 17 00:00:00 2001
 From: Leah Rowe <leah@libreboot.org>
 Date: Fri, 6 Oct 2023 23:17:06 +0100
 Subject: [PATCH 1/1] add central Makefile in main directory
 
-it just runs the Makefiles in build32 and build64
+it only does build64. i'm disabling use of 32-bit memtest in lbmk,
+until i can figure out a more consistent cross-compile method,
+rather than relying on hostcc.
 
-all, clean and distclean(runs clean) are supported
+a user on irc reported build issues on pop os
 
-this makes memtest86plus integrate easier in lbmk
+it's not pop's fault. lbmk needs to start handling cross
+compilers properly. (alternatively, i could rig memtest86+
+to use crossgcc. i'll explore that later)
 
 Signed-off-by: Leah Rowe <leah@libreboot.org>
 ---
- Makefile | 14 ++++++++++++++
- 1 file changed, 14 insertions(+)
+ Makefile | 11 +++++++++++
+ 1 file changed, 11 insertions(+)
  create mode 100644 Makefile
 
 diff --git a/Makefile b/Makefile
 new file mode 100644
-index 0000000..50f2d58
+index 0000000..59fcbef
 --- /dev/null
 +++ b/Makefile
-@@ -0,0 +1,14 @@
+@@ -0,0 +1,11 @@
 +# SPDX-License-Identifier: MIT
 +# SPDX-FileCopyrightText: 2023 Leah Rowe <leah@libreboot.org>
 +
 +all:
-+	make -C build32
 +	make -C build64
 +
 +clean:
-+	make -C build32 clean
 +	make -C build64 clean
 +
 +distclean:
-+	make -C build32 clean
 +	make -C build64 clean
 -- 
 2.39.2
diff --git a/script/build/fw/coreboot b/script/build/fw/coreboot
index 091f9f0d..8efa39c3 100755
--- a/script/build/fw/coreboot
+++ b/script/build/fw/coreboot
@@ -130,7 +130,7 @@ prepare_target()
 
 	build_dependency_seabios
 
-	memtest_bin="memtest86plus/build${arch#*_}/memtest.bin"
+	memtest_bin="memtest86plus/build64/memtest.bin"
 	[ "${payload_memtest}" != "y" ] || [ -f "src/${memtest_bin}" ] || \
 		x_ ./update project trees -b memtest86plus