\DeclareFontFamily{OMS}{DejaVuSansMono}{}
\DeclareFontShape{OMS}{DejaVuSansMono}{m}{n}{ <-> s*[0.8] OMSDejaVuSansMono}{}
\DeclareFontShape{OMS}{DejaVuSansMono}{bx}{n}{ <-> s*[0.8] OMSDejaVuSansMono-Bold}{}
\DeclareFontShape{OMS}{DejaVuSansMono}{m}{sl}{ <-> s*[0.8] OT1DejaVuSansMono-Oblique}{}
\DeclareFontShape{OMS}{DejaVuSansMono}{bx}{sl}{ <-> s*[0.8] OT1DejaVuSansMono-BoldOblique}{}