+##########################
+# Test depending on e.g. OS or version of a non-TeX-Live dependency.
+# Note that a full, up-to-date TeX Live installation is required so this
+# sublabel is about versions of other dependencies.
+
+# Encoding cp858 only supported by some iconv variants
+# Gnu iconv only supports it, if configured with "--enable-extra-encodings"
+# (see https://www.gnu.org/software/libiconv/)
+export/export/latex/cp858_pdf2
+
+# Seminar export with LaTeX fails in latest TeXLive:
+export/examples/(|fr/)seminar_(dvi|pdf).*
+
+# since TL18, Babel-Ukrainean uses UTF-8 if it detects Xe/LuaTeX (for "\date").
+# * garbled output with LuaTeX + TeX fonts (since TL18)
+# * missing chars with XeTeX + TeX fonts (see invertedTests)
+export/export/latex/uk-babel-date-missing-chars-with-ascii_.*_texF
+export/(doc|examples)/uk/(Intro|Welcome)_.*_texF
+
+# new problem with TL18 (see invertedTests)
+export/export/latex/luainputenc-utf8_pdf5_texF
+
+# aastex: hard-coded version in class name:
+# 2018-05-12 aastex6.cls -> aastex62.cls
+export/examples/Articles/American_Astronomical_Society_.*
+export/templates/Articles/American_Astronomical_Society_.*
+
+# `acmart` calls "libertine" as default font.
+# With TeXLive < 18, this clashes with LyX setting up 8-bit TeX fonts
+# PDF (luatex) and PDF (xetex) (compilation error or wrong fonts).
+# See also #9744 allow parallel configuration of TeX and non-TeX fonts.
+export/templates/Articles/Association_for_Computing_Machinery_pdf[45]_texF