diff --git a/pkgs/tools/typesetting/tex/texlive/combine.nix b/pkgs/tools/typesetting/tex/texlive/combine.nix
index 1a0a9b877bf..69fde7784f5 100644
--- a/pkgs/tools/typesetting/tex/texlive/combine.nix
+++ b/pkgs/tools/typesetting/tex/texlive/combine.nix
@@ -126,8 +126,6 @@ in buildEnv {
       patchCnfLua "./texmfcnf.lua"
 
       mkdir $out/share/texmf-local
-
-      rm updmap.cfg
     )
   '' +
     # updmap.cfg seems like not needing changes
@@ -216,7 +214,7 @@ in buildEnv {
     texlinks.sh "$out/bin" && wrapBin
     (perl `type -P fmtutil.pl` --sys --all || true) | grep '^fmtutil' # too verbose
     #texlinks.sh "$out/bin" && wrapBin # do we need to regenerate format links?
-    perl `type -P updmap.pl` --sys --syncwithtrees --force
+    echo y | perl `type -P updmap.pl` --sys --syncwithtrees --force
     perl `type -P mktexlsr.pl` ./share/texmf-* # to make sure
   '' +
     # install (wrappers for) scripts, based on a list from upstream texlive