---
 share/pkgs/scribble-lib/scribble/scribble-load.tex |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- share/pkgs/scribble-lib/scribble/scribble-load.tex
+++ share/pkgs/scribble-lib/scribble/scribble-load.tex	2022-06-09 06:57:39.433303456 +0000
@@ -8,7 +8,8 @@
 % would load amsmath *after* mathabx and wasysym,
 % causing command redefinition issues.
 \newcommand{\packageAmsmath}{\usepackage{amsmath}}
-\newcommand{\packageMathabx}{\usepackage{mathabx}}
+% Both 'mathabx' and 'amsmath' define a '\frac' command (among others).
+\newcommand{\packageMathabx}{\ifx\frac\undefined \usepackage{mathabx} \else \relax \fi}
 % Avoid conflicts between "mathabx" and "wasysym",
 % and between "wasysym" integrals and "amsmath" integrals (iint).
 \newcommand{\packageWasysym}{