diff --git a/sdk/build-github.sh b/sdk/build-github.sh
index 2da93e40b..6566d0912 100755
--- a/sdk/build-github.sh
+++ b/sdk/build-github.sh
@@ -117,7 +117,9 @@ swu_recipe_name() {
 # Per-platform data
 while read _pl _tgt; do
 	[ -n "${DY_TARGET}" ] && _tgt="${DY_TARGET}" || true
-	eval "${_pl}_tgt=\"${_tgt}\""
+	# Dashes are not allowed in variables so let's substitute them on
+	# the fly with underscores.
+	eval "${_pl//-/_}_tgt=\"${_tgt//,/ }\""
 done<<-_EOF_
 	ccimx8x-sbc-express  dey-image-qt
 	ccimx6qpsbc          dey-image-qt
@@ -159,7 +161,9 @@ fi
 # Create projects and build
 rm -rf ${YOCTO_IMGS_DIR} ${YOCTO_PROJ_DIR}
 for platform in ${DY_PLATFORMS}; do
-	eval platform_targets="\${${platform}_tgt}"
+	# The variables <platform>_var|tgt got their dashes converted to
+	# underscores, so we must convert also the ones in ${platform}.
+	eval platform_targets=\"\${${platform//-/_}_tgt}\"
 	_this_prj_dir="${YOCTO_PROJ_DIR}/${platform}"
 	_this_img_dir="${YOCTO_IMGS_DIR}/${platform}"
 	mkdir -p ${_this_img_dir} ${_this_prj_dir}