a4term: rename package to a4

Although the website is `a4term.com`, the package itself is named `a4`,
as one can take from both its repo name[0] and its description on the
manpage[1]. Moreover, when searching for the package on `Repology`, it
is called `a4` by the Void Linux package[2], its only other packaging
besides nixpkgs.

[0]: https://github.com/rpmohn/a4
[1]: https://github.com/rpmohn/a4/blob/main/a4.1
[2]: https://repology.org/project/a4/packages

pkgs/by-name/a4/a4/package.nix

@@ -5,14 +5,14 @@
 , libvterm-neovim
 }:
 
-stdenv.mkDerivation rec {
-  pname = "a4term";
+stdenv.mkDerivation (finalAttrs: {
+  pname = "a4";
   version = "0.2.3";
 
   src = fetchFromGitHub {
     owner = "rpmohn";
     repo = "a4";
-    rev = "v${version}";
+    rev = "v${finalAttrs.version}";
     hash = "sha256-AX5psz9+bLdFFeDR55TIrAWDAkhDygw6289OgIfOJTg=";
   };
 
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
     libvterm-neovim
   ];
 
-  makeFlags = [ "PREFIX=$(out)" ];
+  installFlags = [ "PREFIX=${placeholder "out"}" ];
 
   meta = {
     description = "A dynamic terminal window manager";
@@ -31,4 +31,4 @@ stdenv.mkDerivation rec {
     platforms = lib.platforms.linux;
     mainProgram = "a4";
   };
-}
+})

pkgs/top-level/aliases.nix

@@ -55,6 +55,7 @@ mapAliases ({
 
   ### A ###
 
+  a4term = a4; # Added 2023-10-06
   airfield = throw "airfield has been removed due to being unmaintained"; # Added 2023-05-19
   alertmanager-bot = throw "alertmanager-bot is broken and has been archived by upstream" ; # Added 2023-07-28
   alsaLib = alsa-lib; # Added 2021-06-09

pkgs/top-level/all-packages.nix

@@ -7657,8 +7657,6 @@ with pkgs;
 
   dvtm-unstable = callPackage ../tools/misc/dvtm/unstable.nix { };
 
-  a4term = callPackage ../tools/misc/a4term { };
-
   erofs-utils = callPackage ../tools/filesystems/erofs-utils { };
 
   e2tools = callPackage ../tools/filesystems/e2tools { };