chore(emacs): use recent version of miasma-theme

HACK until the version with `whitespace-mode` support is on MELPA.

modules/nixos/programs/emacs/default.nix

@@ -41,6 +41,7 @@ in
           pkgs.elementary.indent-bars
           pkgs.elementary.adwaita-dark-theme
           pkgs.elementary.anisochromatic
+          pkgs.elementary.miasma-theme
         ];
       };
       earlyInitText = readFiles [

modules/nixos/programs/emacs/init.el

@@ -293,7 +293,7 @@
   :custom
   (catppuccin-flavor 'frappe))
 (use-package anisochromatic :ensure nil)
-(use-package miasma-theme)
+(use-package miasma-theme :ensure nil)
 
 (use-package remember-last-theme
   :config

packages/miasma-theme/default.nix

@@ -0,0 +1,22 @@
+{
+  lib,
+  emacsPackages,
+  fetchFromGitHub,
+  ...
+}:
+emacsPackages.trivialBuild rec {
+  pname = "miasma-theme";
+  version = "7651717";
+
+  src = fetchFromGitHub {
+    owner = "daut";
+    repo = "miasma-theme.el";
+    rev = version;
+    hash = "sha256-0k7yFtyRKcMGniTil5AgiFixSyqm4mrhR7rvoHBv+AE=";
+  };
+
+  meta = {
+    homepage = "https://github.com/daut/miasma-theme.el";
+    license = lib.licenses.gpl3;
+  };
+}