texpresso: modernize / standardize

Move src closer to version attribute, so diffs of version bumps will be
smaller and easier to read, and a version attribute changing without a
hash changing will be more apparent, in case that happens.

pkgs/by-name/te/texpresso/package.nix

@@ -16,10 +16,17 @@
   callPackage,
 }:
 
-stdenv.mkDerivation rec {
+stdenv.mkDerivation (finalAttrs: {
   pname = "texpresso";
   version = "0-unstable-2025-01-29";
 
+  src = fetchFromGitHub {
+    owner = "let-def";
+    repo = "texpresso";
+    rev = "c42a5912f501f180984840fa8adf9ffc09c5ac13";
+    hash = "sha256-T/vou7OcGtNoodCrznmjBLxg6ZAFDCjhpYgNyZaf44g=";
+  };
+
   postPatch = ''
     substituteInPlace Makefile \
       --replace-fail "CC=gcc" "CC=${stdenv.cc.targetPrefix}cc" \
@@ -39,13 +46,6 @@ stdenv.mkDerivation rec {
     libjpeg
   ];
 
-  src = fetchFromGitHub {
-    owner = "let-def";
-    repo = "texpresso";
-    rev = "c42a5912f501f180984840fa8adf9ffc09c5ac13";
-    hash = "sha256-T/vou7OcGtNoodCrznmjBLxg6ZAFDCjhpYgNyZaf44g=";
-  };
-
   buildFlags = [ "texpresso" ];
 
   env.NIX_CFLAGS_COMPILE = toString (
@@ -56,14 +56,14 @@ stdenv.mkDerivation rec {
 
   installPhase = ''
     runHook preInstall
-    install -Dm0755 -t "$out/bin/" "build/${pname}"
+    install -Dm0755 -t "$out/bin/" "build/${finalAttrs.pname}"
     runHook postInstall
   '';
 
   # needs to have texpresso-tonic on its path
   postInstall = ''
     wrapProgram $out/bin/texpresso \
-      --prefix PATH : ${lib.makeBinPath [ passthru.tectonic ]}
+      --prefix PATH : ${lib.makeBinPath [ finalAttrs.finalPackage.passthru.tectonic ]}
   '';
 
   passthru = {
@@ -79,10 +79,10 @@ stdenv.mkDerivation rec {
   };
 
   meta = {
-    inherit (src.meta) homepage;
+    inherit (finalAttrs.src.meta) homepage;
     description = "Live rendering and error reporting for LaTeX";
     maintainers = with lib.maintainers; [ nickhu ];
     license = lib.licenses.mit;
     platforms = lib.platforms.unix;
   };
-}
+})