Hello forum.

I have a question regarding the expansion of variables in a recipe. Suppose I have a recipe with this "do_install" task defined:

    do_install() {

        BBB = ${WORKDIR}

    }

Variable BBB expands to the proper working directory. 

    $ bitbake -e <myrecipe> | grep BBB

    BBB = /path/to/working/directory

However, suppose now I have a recipe with this "do_package_prepend" task defined:

    do_package_prepend() {

        AAA = ${WORKDIR}

    }

Variable AAA doesn't expand to the expected working directory. In fact, it generates an error:

    $ bitbake -e <myrecipe> | grep AAA

    AAA = ${WORKDIR}

          ^

    SyntaxError: invalid syntax

It seems the expansion of variables is not working inside the do_package_prepend task. 

What is going wrong with that?

Thank you in advance! :-)