diff --git a/ports/unix/build-wasi.sh b/ports/unix/build-wasi.sh
index 1f7acb8d9a..056846b394 100755
--- a/ports/unix/build-wasi.sh
+++ b/ports/unix/build-wasi.sh
@@ -10,24 +10,12 @@
 # WASI_SDK: wasi-sdk 21.0
 # WASM_OPT: binaryen wasm-opt built with the above patches
 # WASI_SYSROOT: wasi-libc built with the above patches
-# ../../../micropython-ulab: check out https://github.com/v923z/micropython-ulab
 
 WASI_SDK=${WASI_SDK:-/opt/wasi-sdk-21.0}
 WASI_SYSROOT=${WASI_SYSROOT:-${HOME}/git/wasi-libc/sysroot}
 BINARYEN_BIN=${BINARYEN_BIN:-${HOME}/git/wasm/binaryen/b/bin}
 WASM_OPT=${WASM_OPT:-${BINARYEN_BIN}/wasm-opt}
 
-# MICROPY_PY_THREAD: GC uses signals, which is not available on wasi.
-
-# the following things seem building well. i disabled them just because
-# i was not intererested in them.
-# MICROPY_VFS_FAT
-# MICROPY_VFS_LFS1
-# MICROPY_VFS_LFS2
-
-# micropython-ulab was added just as an example of user C module.
-# you can remove it if you don't use it.
-
 CFLAGS="-D_WASI_EMULATED_PROCESS_CLOCKS -D_WASI_EMULATED_SIGNAL -D_WASI_EMULATED_MMAN -mllvm -wasm-enable-sjlj" \
 LDFLAGS="-lwasi-emulated-process-clocks -lwasi-emulated-signal -lwasi-emulated-mman" \
 make \
@@ -36,20 +24,10 @@ LD="${WASI_SDK}/bin/wasm-ld" \
 STRIP="${WASI_SDK}/bin/strip" \
 SIZE="${WASI_SDK}/bin/size" \
 UNAME_S=wasi \
-MICROPY_PY_FFI=0 \
-MICROPY_PY_THREAD=0 \
-MICROPY_PY_SOCKET=0 \
-MICROPY_PY_SSL=0 \
-MICROPY_PY_BTREE=0 \
-MICROPY_PY_TERMIOS=0 \
-MICROPY_USE_READLINE=0 \
-MICROPY_VFS_FAT=0 \
-MICROPY_VFS_LFS1=0 \
-MICROPY_VFS_LFS2=0 \
-USER_C_MODULES=../../../micropython-ulab \
+VARIANT=wasi \
 "$@"
 
-PROG=build-standard/micropython
+PROG=build-wasi/micropython
 
 # We doesn't have a way to scan GC roots like WASM locals.
 # Hopefully --spill-pointers can workaround it.
@@ -65,6 +43,6 @@ ${WASM_OPT} \
 
 # now you can run it with EH-enabled runtimes.
 # eg.  (using the latest EH)
-# toywasm --wasi build-standard/micropython.spilled.neweh
+# toywasm --wasi build-wasi/micropython.spilled.neweh
 # eg.  (using the old EH)
-# iwasm build-standard/micropython.spilled
+# iwasm build-wasi/micropython.spilled