Do not build updater when using QEMU model

scripts/build.sh

@@ -9,9 +9,9 @@ then
 fi
 MODEL="$1"
 
-if [ ! -d "models/$1" ]
+if [ ! -d "models/${MODEL}" ]
 then
-  echo "model '$1' not found" >&2
+  echo "model '${MODEL}' not found" >&2
   exit 1
 fi
 MODEL_DIR="$(realpath "models/${MODEL}")"
@@ -62,6 +62,8 @@ FIRMWARE_OPEN_UEFIPAYLOAD="${UEFIPAYLOAD}" \
         "${MODEL_DIR}/coreboot.config" \
         "${COREBOOT}"
 
+if [ "${MODEL}" != "qemu" ]
+then
     # Rebuild firmware-update
     SHASUM="$(sha384sum "${COREBOOT}" | cut -d " " -f 1)"
     export BASEDIR="system76-${SHASUM}"
@@ -80,3 +82,4 @@ then
         mcopy -i "${USB}.partial@@1M" "${MODEL_DIR}/uecflash.efi" "::${BASEDIR}/firmware/uecflash.efi"
     fi
     mv -v "${USB}.partial" "${USB}"
+fi