diff --git a/flake.lock b/flake.lock
index c586b0e..9beec12 100644
--- a/flake.lock
+++ b/flake.lock
@@ -398,11 +398,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1706098335,
-        "narHash": "sha256-r3dWjT8P9/Ah5m5ul4WqIWD8muj5F+/gbCdjiNVBKmU=",
+        "lastModified": 1706718339,
+        "narHash": "sha256-S+S97c/HzkO2A/YsU7ZmNF9w2s7Xk6P8dzmfDdckzLs=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "a77ab169a83a4175169d78684ddd2e54486ac651",
+        "rev": "53fbe41cf76b6a685004194e38e889bc8857e8c2",
         "type": "github"
       },
       "original": {
diff --git a/hm/common.nix b/hm/common.nix
index e455af5..91f70c6 100644
--- a/hm/common.nix
+++ b/hm/common.nix
@@ -182,6 +182,7 @@
       jdupes
       duperemove
       compsize
+      btdu
 
       # toolbox
       imagemagick
diff --git a/hm/scripts/lip b/hm/scripts/lip
index 3663bd2..e3f090a 100755
--- a/hm/scripts/lip
+++ b/hm/scripts/lip
@@ -1,8 +1,8 @@
 #!/usr/bin/env nix-shell
 #! nix-shell -i bash --pure
-#! nix-shell -p bash jq curl findutils coreutils
+#! nix-shell -p bash jq curl cacert findutils coreutils
 
-set -euo pipefail
+set -euxo pipefail
 
 url="https://ip.frogeye.fr/json"
 cachedir="$HOME/.cache/lip"
@@ -16,7 +16,6 @@ then
     jq_sel="$@"
 fi
 
-
 if [ -n "$ip" ]
 then
     cachefile="$cachedir/$ip"