Attempts at using Pixie have never worked for me, so I wondered if the problem was the scenario or the tool itself.
Documentation is lacking and there are no tests in the project to verify.
After a few weeks of hunting and tweaking my google-fu, I found this;
pixiewps -e d0141b15656e96b85fcead2e8e76330d2b1ac1576bb026e7a328c0e1baf8cf91664371174c08ee12ec92b0519c54879f21255be5a8770e1fa1880470ef423c90e34d7847a6fcb4924563d1af1db0c481ead9852c519bf1dd429c163951cf69181b132aea2a3684caf35bc54aca1b20c88bb3b7339ff7d56e09139d77f0ac58079097938251dbbe75e86715cc6b7c0ca945fa8dd8d661beb73b414032798dadee32b5dd61bf105f18d89217760b75c5d966a5a490472ceba9e3b4224f3d89fb2b -r 631cf02e22f5949b78c93e063c0d566c86b839c157dd43f0ebb1385b3fbb8beb89ca502b99e45ddafdc9949db8074c4d99bbad43c60ac1a633f7137dfcc64d70234ca40a342cfa64241010c46a7dcd1930b6149f11df44cb8350401f7d090dbf9c9858c6ec1c2c2816299f2cea4f204e390e232454ffdd4d977746d652b8aef6d14e317b0a8c43e647c7613444faf8a50e3f6639a200664a4058365b829fb942d6aba9c0e341712faffc3612f2df1e70e66df