appendix: 23 Code-Ausschnitte aus dem Houston-Repository

Pin nixpkgs to the revision used by itc.componentware: the channel version
ships a latexminted that crashes on Python 3.14, which made every listing
fail and sent latexmk into an endless error prompt. Also force
nonstopmode/halt-on-error so a broken listing can never loop again.

shell.nix

@@ -1,17 +1,19 @@
-with import <nixpkgs> {}; let
+let
+  # Pinned to the same nixpkgs revision as itc.componentware, where the minted
+  # toolchain is known to work. The channel version ships a latexminted that
+  # crashes on Python 3.14, which makes every code listing fail.
+  pkgs = import (builtins.fetchTarball {
+    url = "https://github.com/NixOS/nixpkgs/archive/cc3f2ee0b3909e42334f34720ccac109a7e67068.tar.gz";
+    sha256 = "sha256:0lz0yl9fmh5wfqp7j7rmcs8qjqr3bf1h5cy4rfdasbnbzh4k9j6x";
+  }) {};
+
   fonts = [
-    times-newer-roman
+    pkgs.times-newer-roman
   ];
-  # This is not reccocgnised by latexmk, so we will have to put our
-  # font files in ~/.local/share/fonts
-  # fontsConf = makeFontsConf {
-  #   fontDirectories = fonts;
-  # };
-  # export FONTCONFIG_FILE="${fontsConf}"
 in
-  mkShell {
+  pkgs.mkShell {
     nativeBuildInputs = fonts;
-    packages = [
+    packages = with pkgs; [
       latexrun
       mermaid-cli
       times-newer-roman
@@ -42,6 +44,6 @@ in
       # install fonts
       DEST=~/.local/share/fonts/TimesNewerRoman
       mkdir -p $DEST
-      cp -r ${toString times-newer-roman}/share/fonts/opentype "$DEST"
+      cp -rn ${toString pkgs.times-newer-roman}/share/fonts/opentype "$DEST" 2>/dev/null || true
     '';
   }