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-rw-r--r--macros/latex/contrib/l3build/l3build-install.lua4
1 files changed, 4 insertions, 0 deletions
diff --git a/macros/latex/contrib/l3build/l3build-install.lua b/macros/latex/contrib/l3build/l3build-install.lua
index 21257aad0d..78fe2d4b2f 100644
--- a/macros/latex/contrib/l3build/l3build-install.lua
+++ b/macros/latex/contrib/l3build/l3build-install.lua
@@ -38,6 +38,10 @@ local insert = table.insert
local function gethome()
set_program("latex")
local result = options["texmfhome"] or var_value("TEXMFHOME")
+ if not result or result == "" or match(result, os_pathsep) then
+ print("Ambiguous TEXMFHOME setting: please use the --texmfhome option")
+ os.exit(1)
+ end
mkdir(result)
return abspath(result)
end