Some plotting libraries require the developer to explicitly designate the font pack to be used when rendering text.
The full list of available fonts is below:
/usr/share/fonts/truetype/dejavu/DejaVuSerifCondensed-Bold.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed-BoldOblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSans-Bold.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSans-Oblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed-Bold.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerif.ttf
/usr/share/fonts/truetype/dejavu/DejaVuMathTeXGyre.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerif-BoldItalic.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed-Oblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerifCondensed-Italic.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansMono.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerif-Bold.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansMono-Oblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerifCondensed.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerif-Italic.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansMono-BoldOblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSans-ExtraLight.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSans-BoldOblique.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansCondensed.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSansMono-Bold.ttf
/usr/share/fonts/truetype/dejavu/DejaVuSerifCondensed-BoldItalic.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerifCondensed-Bold.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansCondensed-BoldOblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Bold.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-Oblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansCondensed-Bold.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif-BoldItalic.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansCondensed-Oblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerifCondensed-Italic.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif-Bold.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-Oblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerifCondensed.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerif-Italic.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-BoldOblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-ExtraLight.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSans-BoldOblique.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansCondensed.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSansMono-Bold.ttf
/usr/share/fonts/truetype/ttf-dejavu/DejaVuSerifCondensed-BoldItalic.ttf
/usr/share/fonts/opentype/noto/NotoSerifCJK-Bold.ttc
/usr/share/fonts/opentype/noto/NotoSansCJK-Bold.ttc
/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc
/usr/share/fonts/opentype/noto/NotoSerifCJK-Regular.ttc