diff --git a/flake.lock b/flake.lock
index f5c1fb1..54a6932 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,11 +2,11 @@
   "nodes": {
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1621740021,
-        "narHash": "sha256-uLu8Zgrkbsq8mnl6LjbcMvItFyAaLH45Iik5qMmb9T0=",
+        "lastModified": 1621565684,
+        "narHash": "sha256-EDssKjLt2dDXatuZaLPw8qi8FwWAiOmbPMEoi782UhU=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "5df3462dda05d8e44669cf374776274e1bc47d0a",
+        "rev": "cb4febf24b04ef44abe7aaa692e71b965083294d",
         "type": "github"
       },
       "original": {
@@ -23,11 +23,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1621794721,
-        "narHash": "sha256-JXfTSZUu9EVbT9D/MFsx0cXfa8bw1NFCzIxZ7gO73Uo=",
+        "lastModified": 1621227293,
+        "narHash": "sha256-eLBymCG2AvHpex58S3NdDueUWydQgnv3Jzm+Ec+aIWw=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "90493027e33ba9eb3f50dc1da365d0e4ca31bf14",
+        "rev": "6a471f1b1111408d541caf04e64650813bfb22ac",
         "type": "github"
       },
       "original": {
@@ -55,11 +55,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1621840840,
-        "narHash": "sha256-o6h6+d5ZwrFmOTe+ma9s1Z9kyHsCW1C84IA8RZ9/fIU=",
+        "lastModified": 1621288494,
+        "narHash": "sha256-3lQCSw8/J076UwoQhtSVymOibLuojlqF9BAMP6X+/48=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ea7d4aa9b8225abd6147339f0d56675d6f1f0fd1",
+        "rev": "673aea9f84c955c94b105797fdc56007017af4db",
         "type": "github"
       },
       "original": {
diff --git a/home/x/i3bar.nix b/home/x/i3bar.nix
index 2f8b4c8..d75951f 100644
--- a/home/x/i3bar.nix
+++ b/home/x/i3bar.nix
@@ -56,7 +56,7 @@ in
               block = "temperature";
               collapsed = false;
               interval = 10;
-              format = "{max}";
+              format = "{max}°";
               # FIXME: specific to my AMD Ryzen CPU. Make this depend on
               # hostname or something else
               chip = "k10temp-pci-*";