  We construct novel classes of compact G2 spaces from lifting type IIA flux
backgrounds with O6 planes. There exists an extension of IIA Calabi-Yau
orientifolds for which some of the D6 branes (required to solve the RR tadpole)
are dissolved in $F_2$ fluxes. The backreaction of these fluxes deforms the
Calabi-Yau manifold into a specific class of SU(3)-structure manifolds. The
lift to M-theory again defines compact G2 manifolds, which in case of toroidal
orbifolds are a twisted generalisation of the Joyce construction. This
observation also allows a clear identification of the moduli space of a warped
compactification with fluxes. We provide a few explicit examples, of which some
can be constructed from T-dualising known IIB orientifolds with fluxes. Finally
we discuss supersymmetry breaking in this context and suggest that the purely
geometric picture in M-theory could provide a simpler setting to address some
of the consistency issues of moduli stabilisation and de Sitter uplifting.
