diff --git a/slides_template/fonts.tex b/slides_template/fonts.tex
index 747563b..25ba10a 100644
--- a/slides_template/fonts.tex
+++ b/slides_template/fonts.tex
@@ -1,19 +1,7 @@
-% Font setup shared by the slides and by the notes pages that mknotes
-% typesets, so that the two match. Loaded by example.tex directly and passed
-% to mknotes with --preamble.
-%
-% Requires fontspec, which unicode-math pulls in on the slides side. Paths must
-% stay relative to the document directory: LuaTeX fails to resolve a
-% parent-relative Path= and dies with an unhelpful empty-filename error.
+% Shared by the slides and by the notes pages mknotes typesets, so the two
+% match. Both families come from texlive-fonts-extra.
 
-\setsansfont{OpenSans}[
-  Path = fonts/OpenSans/, Extension = .ttf,
-  UprightFont = *-Regular, BoldFont = *-Bold,
-  ItalicFont = *-Italic, BoldItalicFont = *-BoldItalic]
-
-\setmonofont{RobotoMono}[
-  Path = fonts/RobotoMono/, Extension = .ttf,
-  UprightFont = *-Regular, BoldFont = *-Bold,
-  ItalicFont = *-Italic, BoldItalicFont = *-BoldItalic]
+\setsansfont{Open Sans}
+\setmonofont{Roboto Mono}
 
 \renewcommand{\familydefault}{\sfdefault}
diff --git a/slides_template/fonts/OpenSans/OpenSans-Bold.ttf b/slides_template/fonts/OpenSans/OpenSans-Bold.ttf
deleted file mode 100644
index 7b52945..0000000
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diff --git a/slides_template/fonts/OpenSans/OpenSans-BoldItalic.ttf b/slides_template/fonts/OpenSans/OpenSans-BoldItalic.ttf
deleted file mode 100644
index a670e14..0000000
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diff --git a/slides_template/fonts/OpenSans/OpenSans-Italic.ttf b/slides_template/fonts/OpenSans/OpenSans-Italic.ttf
deleted file mode 100644
index e6c5414..0000000
Binary files a/slides_template/fonts/OpenSans/OpenSans-Italic.ttf and /dev/null differ
diff --git a/slides_template/fonts/OpenSans/OpenSans-Regular.ttf b/slides_template/fonts/OpenSans/OpenSans-Regular.ttf
deleted file mode 100644
index 2e31d02..0000000
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diff --git a/slides_template/fonts/RobotoMono/RobotoMono-Bold.ttf b/slides_template/fonts/RobotoMono/RobotoMono-Bold.ttf
deleted file mode 100644
index c6a81a5..0000000
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diff --git a/slides_template/fonts/RobotoMono/RobotoMono-BoldItalic.ttf b/slides_template/fonts/RobotoMono/RobotoMono-BoldItalic.ttf
deleted file mode 100644
index b2261d6..0000000
Binary files a/slides_template/fonts/RobotoMono/RobotoMono-BoldItalic.ttf and /dev/null differ
diff --git a/slides_template/fonts/RobotoMono/RobotoMono-Italic.ttf b/slides_template/fonts/RobotoMono/RobotoMono-Italic.ttf
deleted file mode 100644
index 6e4001e..0000000
Binary files a/slides_template/fonts/RobotoMono/RobotoMono-Italic.ttf and /dev/null differ
diff --git a/slides_template/fonts/RobotoMono/RobotoMono-Regular.ttf b/slides_template/fonts/RobotoMono/RobotoMono-Regular.ttf
deleted file mode 100644
index 495a82c..0000000
Binary files a/slides_template/fonts/RobotoMono/RobotoMono-Regular.ttf and /dev/null differ
diff --git a/slides_template/mknotes b/slides_template/mknotes
index 571ec99..092031a 100755
--- a/slides_template/mknotes
+++ b/slides_template/mknotes
@@ -210,8 +210,8 @@ def build_notes_pdf(pages, width, height, thumb_w, thumb_h, workdir,
     bandwidth = width - thumb_w
 
     # \input rather than the file's contents, so that anything relative inside
-    # it (font paths, say) resolves against the document directory. LaTeX runs
-    # from there even though its output goes to the working directory.
+    # it resolves against the document directory. LaTeX runs from there even
+    # though its output goes to the working directory.
     extra = r"\input{%s}" % preamble if preamble else ""
 
     body = [NOTES_PREAMBLE % {