fix: loop over lines, functional var substitution

build.sh

@@ -4,7 +4,7 @@ rpm-ostree override remove firefox firefox-langpacks
 
 echo "-- Installing RPMs defined in recipe.yml --"
 rpm_packages=$(yq '.rpms[]' < /etc/ublue-recipe.yml)
-for pkg in $rpm_packages; do \
+for pkg in $(echo -e "$rpm_packages"); do \
     echo "Installing: ${pkg}" && \
     rpm-ostree install $pkg; \
 done
@@ -17,6 +17,6 @@ pip install --prefix=/usr yafti
 yq -i '.screens.applications.values.groups.Custom.description = "Flatpaks defined by the image maintainer"' /etc/yafti.yml
 yq -i '.screens.applications.values.groups.Custom.default = true' /etc/yafti.yml
 flatpaks=$(yq '.flatpaks[]' < /etc/ublue-recipe.yml)
-for pkg in $flatpaks; do \
-    yq -i ".screens.applications.values.groups.Custom.packages += [{'$pkg': '$pkg'}]" /etc/yafti.yml
+for pkg in $(echo -e "$flatpaks"); do \
+    yq -i ".screens.applications.values.groups.Custom.packages += [{\"$pkg\": \"$pkg\"}]" /etc/yafti.yml
 done