From 2dc9ef1b2b87452924de8b8b6868cf854eac6e72 Mon Sep 17 00:00:00 2001
From: Vincenzo Mantova <1962985+xworld21@users.noreply.github.com>
Date: Sun, 17 May 2026 13:21:32 +0100
Subject: [PATCH] texlivePackages: add mainProgram to all packages with a
 single binary

---
 .../typesetting/tex/texlive/build-texlive-package.nix    | 9 +++++++--
 pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix   | 2 --
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix b/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
index bda645c350b7..e44d22a25e22 100644
--- a/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
+++ b/pkgs/tools/typesetting/tex/texlive/build-texlive-package.nix
@@ -83,10 +83,15 @@ let
   // lib.optionalAttrs hasCatalogue {
     homepage = "https://ctan.org/pkg/${catalogue}";
   }
-  // lib.optionalAttrs (args ? mainProgram) {
-    inherit (args) mainProgram;
+  // lib.optionalAttrs (mainProgram != null) {
+    inherit mainProgram;
   };
 
+  # if binfiles contains exactly one entry, use it as mainProgram, but allow overrides via args.mainProgram
+  mainProgram =
+    args.mainProgram
+      or (if builtins.length (args.binfiles or [ ]) == 1 then builtins.head args.binfiles else null);
+
   hasBinfiles = args ? binfiles && args.binfiles != [ ];
   hasDocfiles = sha512 ? doc;
   hasSource = sha512 ? source;
diff --git a/pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix b/pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix
index 80b7128ca334..f2321c21cbc5 100644
--- a/pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix
+++ b/pkgs/tools/typesetting/tex/texlive/tlpdb-overrides.nix
@@ -627,6 +627,4 @@ lib.recursiveUpdate orig rec {
       fi
     '';
   };
-
-  texcount.mainProgram = "texcount";
 }