I am uploading a NMU to fix this.
The debdiff is attached.
diff -Nru yacas-1.3.6/debian/changelog yacas-1.3.6/debian/changelog
--- yacas-1.3.6/debian/changelog 2023-09-29 17:12:48.000000000 +0200
+++ yacas-1.3.6/debian/changelog 2023-10-09 20:28:32.000000000 +0200
@@ -1,3 +1,10 @@
+yacas (1.3.6-2.3) unstable; urgency=medium
+
+ * Non-maintainer upload.
+ * Add build dependency autoconf-archive. (Closes: #1053728)
+
+ -- Bastian Germann <b...@debian.org> Mon, 09 Oct 2023 20:28:32 +0200
+
yacas (1.3.6-2.2) unstable; urgency=medium
* Non-maintainer upload.
diff -Nru yacas-1.3.6/debian/control yacas-1.3.6/debian/control
--- yacas-1.3.6/debian/control 2023-09-29 17:12:48.000000000 +0200
+++ yacas-1.3.6/debian/control 2023-10-09 20:28:32.000000000 +0200
@@ -8,6 +8,7 @@
libgsl-dev,
automake,
autoconf,
+ autoconf-archive,
freeglut3-dev,
libxmu-dev,
libxt-dev,
