diff --git a/nix/home.nix b/nix/home.nix
index e699e76..a29d295 100644
--- a/nix/home.nix
+++ b/nix/home.nix
@@ -101,9 +101,9 @@ in
   services.screen-locker = {
     enable = true;
 
-    lockCmd = "/bin/bash ~/scripts/lock.sh";
+    lockCmd = "/bin/bash -c ${config.home.homeDirectory}/scripts/lock.sh";
 
-    inactiveInterval = 5;
+    inactiveInterval = 1;
   };
 
   services.gpg-agent.enable = true;
@@ -150,6 +150,12 @@ in
         source "$HOME/.ghcup/env"
       fi
     '';
+
+    shellAliases = {
+      ls = "${pkgs.exa}/bin/exa -1";
+      ll = "${pkgs.exa}/bin/exa -l";
+      lt = "${pkgs.exa}/bin/exa --tree";
+    };
   };
 
   # enable git VCS
@@ -181,10 +187,7 @@ in
   };
 
   # replacement for 'ls' written in rust
-  programs.exa = {
-    enable = true;
-    enableAliases = true;
-  };
+  programs.exa.enable = true;
 
   # a fast cd command that learns your habbits
   programs.zoxide = {
diff --git a/scripts/lock.sh b/scripts/lock.sh
index c852c6f..6f0ab2f 100755
--- a/scripts/lock.sh
+++ b/scripts/lock.sh
@@ -1,2 +1,2 @@
 #!/bin/bash
-/usr/bin/i3lock -ei $(exa -1 ~/pictures/wallpapers/*.png | awk '{ print $1 }' | sort -R | head -n 1)
+/usr/bin/i3lock -ei $(ls $HOME/pictures/wallpapers/*.png | awk '{ print $1 }' | sort -R | head -n 1)