diff --git a/.profile b/.profile
index 9ace7e6..2e22caa 100755
--- a/.profile
+++ b/.profile
@@ -19,9 +19,20 @@ then
 	PATH="$HOMEBREW_PREFIX/opt/php@8.3/sbin:$PATH"
 else
 	PATH="$HOME/Projects/tools/flutter/bin:$PATH"
-	export SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
 fi
 
+# Start an SSH agent.
+if [ -z "$SSH_AUTH_SOCK" ]
+then
+	if [ ! -S ~/.ssh/ssh_auth_sock ]
+	then
+		eval $(ssh-agent)
+		ln -sf "$SSH_AUTH_SOCK" ~/.ssh/ssh_auth_sock
+	fi
+	export SSH_AUTH_SOCK=~/.ssh/ssh_auth_sock
+fi
+
+# Set up Android development environment.
 if [ -d "$HOME/Projects/tools/android" ]
 then
 	export ANDROID_HOME="$HOME/Projects/tools/android"
diff --git a/.tmux.conf b/.tmux.conf
index b50be17..7602758 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -1,9 +1,18 @@
+# Remap the prefix.
+unbind-key C-b
+set-option -g prefix C-Space
+bind-key C-Space send-prefix
+
 set -s escape-time 0
 set -g mouse on
 
 set -g status-keys vi
 set -g mode-keys vi
 
+# Status bar.
+set -g status-style bg=default
+set -g status-right ''
+
 # Reset bindings without the repeat time
 bind-key Left select-pane -L
 bind-key Right select-pane -R
@@ -13,6 +22,5 @@ bind-key Down select-pane -D
 # List of plugins
 set -g @plugin 'tmux-plugins/tpm'
 set -g @plugin 'tmux-plugins/tmux-sensible'
-set -g @plugin "arcticicestudio/nord-tmux"
 
 run '~/.tmux/plugins/tpm/tpm'