diff --git a/board/freescale/imx8mm_evk/README b/board/freescale/imx8mm_evk/README
index a885bc5..c908c0a 100644
--- a/board/freescale/imx8mm_evk/README
+++ b/board/freescale/imx8mm_evk/README
@@ -9,18 +9,18 @@
 
 Get and Build the ARM Trusted firmware
 ======================================
-Note: srctree is U-Boot source directory
+Note: builddir is U-Boot build directory (source directory for in-tree builds)
 Get ATF from: https://source.codeaurora.org/external/imx/imx-atf
 branch: imx_4.19.35_1.0.0
 $ make PLAT=imx8mm bl31
-$ cp build/imx8mm/release/bl31.bin $(srctree)
+$ cp build/imx8mm/release/bl31.bin $(builddir)
 
 Get the ddr and hdmi firmware
 =============================
 $ wget https://www.nxp.com/lgfiles/NMG/MAD/YOCTO/firmware-imx-8.0.bin
 $ chmod +x firmware-imx-8.0.bin
 $ ./firmware-imx-8.0
-$ cp firmware-imx-7.9/firmware/ddr/synopsys/lpddr4*.bin $(srctree)
+$ cp firmware-imx-7.9/firmware/ddr/synopsys/lpddr4*.bin $(builddir)
 
 Build U-Boot
 ============