diff --git a/overlay/Tmux.nix b/overlay/Tmux.nix
new file mode 100644
index 00000000..3ff2659f
--- /dev/null
+++ b/overlay/Tmux.nix
@@ -0,0 +1,22 @@
+{
+	__findFile,
+	config,
+	pkgs,
+	...
+} @args: {
+	# SEE: https://github.com/tmux/tmux/issues/4264
+	# FIXME: Later.
+	nixpkgs.overlays = [(final: prev: {
+		tmux = prev.tmux.overrideAttrs (old: {
+			src = prev.fetchFromGitHub {
+				hash  = "sha256-EuTEN+B+rE76nLQRIljy2PL2gp+rVGk+ygEhQA2nZww=";
+				owner = "tmux";
+				repo  = "tmux";
+				rev   = "db978db27161f57b01f22407d2dda2bce203c2cf";
+			};
+			patches = (old.patches or [ ]) ++ [
+				<patch/tmux/SelectionStyle.patch>
+			];
+		});
+	})];
+}
diff --git a/patch/tmux/SelectionStyle.patch b/patch/tmux/SelectionStyle.patch
new file mode 100644
index 00000000..cc1c80f2
--- /dev/null
+++ b/patch/tmux/SelectionStyle.patch
@@ -0,0 +1,124 @@
+diff --git a/options-table.c b/options-table.c
+index 515714f..92b127e 100644
+--- a/options-table.c
++++ b/options-table.c
+@@ -1025,6 +1025,24 @@ const struct options_table_entry options_table[] = {
+ 	  .text = "Format of the position indicator in copy mode."
+ 	},
+ 
++	{ .name = "copy-mode-position-style",
++	  .type = OPTIONS_TABLE_STRING,
++	  .scope = OPTIONS_TABLE_WINDOW,
++	  .default_str = "#{mode-style}",
++	  .flags = OPTIONS_TABLE_IS_STYLE,
++	  .separator = ",",
++	  .text = "Style of position indicator in copy mode."
++	},
++
++	{ .name = "copy-mode-selection-style",
++	  .type = OPTIONS_TABLE_STRING,
++	  .scope = OPTIONS_TABLE_WINDOW,
++	  .default_str = "#{mode-style}",
++	  .flags = OPTIONS_TABLE_IS_STYLE,
++	  .separator = ",",
++	  .text = "Style of selection in copy mode."
++	},
++
+ 	{ .name = "fill-character",
+ 	  .type = OPTIONS_TABLE_STRING,
+ 	  .scope = OPTIONS_TABLE_WINDOW,
+diff --git a/tmux.1 b/tmux.1
+index 98cf871..38552cf 100644
+--- a/tmux.1
++++ b/tmux.1
+@@ -4890,6 +4890,22 @@ or
+ contains
+ .Ql vi .
+ .Pp
++.It Ic copy-mode-position-style Ar style
++Set the style of the position indicator in copy mode.
++For how to specify
++.Ar style ,
++see the
++.Sx STYLES
++section.
++.Pp
++.It Ic copy-mode-selection-style Ar style
++Set the style of the selection in copy mode.
++For how to specify
++.Ar style ,
++see the
++.Sx STYLES
++section.
++.Pp
+ .It Ic mode-style Ar style
+ Set window modes style.
+ For how to specify
+diff --git a/window-copy.c b/window-copy.c
+index 36b9f89..1cda6d3 100644
+--- a/window-copy.c
++++ b/window-copy.c
+@@ -4391,13 +4391,15 @@ window_copy_write_line(struct window_mode_entry *wme,
+ 	char				*expanded;
+ 	struct format_tree		*ft;
+ 
+-	style_apply(&gc, oo, "mode-style", NULL);
++	ft = format_create_defaults(NULL, NULL, NULL, NULL, wp);
++
++	style_apply(&gc, oo, "copy-mode-position-style", ft);
+ 	gc.flags |= GRID_FLAG_NOPALETTE;
+-	style_apply(&mgc, oo, "copy-mode-match-style", NULL);
++	style_apply(&mgc, oo, "copy-mode-match-style", ft);
+ 	mgc.flags |= GRID_FLAG_NOPALETTE;
+-	style_apply(&cgc, oo, "copy-mode-current-match-style", NULL);
++	style_apply(&cgc, oo, "copy-mode-current-match-style", ft);
+ 	cgc.flags |= GRID_FLAG_NOPALETTE;
+-	style_apply(&mkgc, oo, "copy-mode-mark-style", NULL);
++	style_apply(&mkgc, oo, "copy-mode-mark-style", ft);
+ 	mkgc.flags |= GRID_FLAG_NOPALETTE;
+ 
+ 	window_copy_write_one(wme, ctx, py, hsize - data->oy + py,
+@@ -4406,14 +4408,12 @@ window_copy_write_line(struct window_mode_entry *wme,
+ 	if (py == 0 && s->rupper < s->rlower && !data->hide_position) {
+ 		value = options_get_string(oo, "copy-mode-position-format");
+ 		if (*value != '\0') {
+-			ft = format_create_defaults(NULL, NULL, NULL, NULL, wp);
+ 			expanded = format_expand(ft, value);
+ 			if (*expanded != '\0') {
+ 				screen_write_cursormove(ctx, 0, 0, 0);
+ 				format_draw(ctx, &gc, sx, expanded, NULL, 0);
+ 			}
+ 			free(expanded);
+-			format_free(ft);
+ 		}
+ 	}
+ 
+@@ -4421,6 +4421,8 @@ window_copy_write_line(struct window_mode_entry *wme,
+ 		screen_write_cursormove(ctx, screen_size_x(s) - 1, py, 0);
+ 		screen_write_putc(ctx, &grid_default_cell, '$');
+ 	}
++
++	format_free(ft);
+ }
+ 
+ static void
+@@ -4668,6 +4670,7 @@ window_copy_set_selection(struct window_mode_entry *wme, int may_redraw,
+ 	struct grid_cell		 gc;
+ 	u_int				 sx, sy, cy, endsx, endsy;
+ 	int				 startrelpos, endrelpos;
++	struct format_tree		*ft;
+ 
+ 	window_copy_synchronize_cursor(wme, no_reset);
+ 
+@@ -4689,8 +4692,10 @@ window_copy_set_selection(struct window_mode_entry *wme, int may_redraw,
+ 	}
+ 
+ 	/* Set colours and selection. */
+-	style_apply(&gc, oo, "mode-style", NULL);
++	ft = format_create_defaults(NULL, NULL, NULL, NULL, wp);
++	style_apply(&gc, oo, "copy-mode-selection-style", ft);
+ 	gc.flags |= GRID_FLAG_NOPALETTE;
++	format_free(ft);
+ 	screen_set_selection(s, sx, sy, endsx, endsy, data->rectflag,
+ 	    data->modekeys, &gc);
+