diff --git a/default.nix b/default.nix
index 4067e08e..24aa4e6e 100644
--- a/default.nix
+++ b/default.nix
@@ -39,10 +39,6 @@ with lib.my;
   system.configurationRevision = with inputs; mkIf (self ? rev) self.rev;
   system.stateVersion = "21.05";
 
-  # HACK Momentarily fix 'install-info: cannot allocate memory for gzip -d'
-  #      errors on latest unstable.
-  documentation.info.enable = false;
-
   ## Some reasonable, global defaults
   # This is here to appease 'nix flake check' for generic hosts with no
   # hardware-configuration.nix or fileSystem config.
@@ -62,7 +58,6 @@ with lib.my;
   environment.systemPackages = with pkgs; [
     bind
     cached-nix-shell
-    coreutils
     git
     vim
     wget
diff --git a/flake.lock b/flake.lock
index 096beb9f..7ab263ee 100644
--- a/flake.lock
+++ b/flake.lock
@@ -22,11 +22,11 @@
     },
     "emacs-overlay": {
       "locked": {
-        "lastModified": 1621740021,
-        "narHash": "sha256-uLu8Zgrkbsq8mnl6LjbcMvItFyAaLH45Iik5qMmb9T0=",
+        "lastModified": 1625475975,
+        "narHash": "sha256-gCOhldE8f0ve5HCP5VPDGRnvh2TUfzDyWWTcfaMvov4=",
         "owner": "nix-community",
         "repo": "emacs-overlay",
-        "rev": "5df3462dda05d8e44669cf374776274e1bc47d0a",
+        "rev": "9fbb5e43ed6ea3b5b704f13b2169f5404c24113b",
         "type": "github"
       },
       "original": {
@@ -42,11 +42,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1622145920,
-        "narHash": "sha256-/tt6IApLuVcGP5auy4zjLzfm5+MBHYLS3Nauvv2U2EQ=",
+        "lastModified": 1625384440,
+        "narHash": "sha256-WnDK+LZioER6eeC8Sm7GPvbiS6XPyUqn+qtc2lvjLHo=",
         "owner": "rycee",
         "repo": "home-manager",
-        "rev": "0e6c61a44092e98ba1d75b41f4f947843dc7814d",
+        "rev": "ac319fd3149b23a3ad8ee24cb2def6e67acf194c",
         "type": "github"
       },
       "original": {
@@ -58,11 +58,11 @@
     },
     "nixos-hardware": {
       "locked": {
-        "lastModified": 1620983891,
-        "narHash": "sha256-E2OKVgGo/cUqDsrIeYGVx64b4cxgzd7+bX33NHL0rbA=",
+        "lastModified": 1625333638,
+        "narHash": "sha256-M6J9RN60XJyv6nUfDFCwnz5aVjhe8+GJnV8Q9VpdQQQ=",
         "owner": "nixos",
         "repo": "nixos-hardware",
-        "rev": "c4399b921fa7ff5f93ee10b3521b56b722ed74d8",
+        "rev": "41775780a0b6b32b3d32dcc32bb9bc6df809062d",
         "type": "github"
       },
       "original": {
@@ -73,11 +73,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1621840840,
-        "narHash": "sha256-o6h6+d5ZwrFmOTe+ma9s1Z9kyHsCW1C84IA8RZ9/fIU=",
+        "lastModified": 1624922035,
+        "narHash": "sha256-OiIxJQuMRkICxaUwY3xMBbrPPu20de/n7tVYnWzLvS4=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "ea7d4aa9b8225abd6147339f0d56675d6f1f0fd1",
+        "rev": "3a8d7958a610cd3fec3a6f424480f91a1b259185",
         "type": "github"
       },
       "original": {
@@ -88,11 +88,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1622059058,
-        "narHash": "sha256-t1/ZMtyxClVSfcV4Pt5C1YpkeJ/UwFF3oitLD7Ch/UA=",
+        "lastModified": 1625403235,
+        "narHash": "sha256-LMitU5qG4zYAO3+5fJbdjmyn9snflCcq+P9eSghbcBI=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "84aa23742f6c72501f9cc209f29c438766f5352d",
+        "rev": "f930ea227cecaed1f1bdb047fef54fe4f0721c8c",
         "type": "github"
       },
       "original": {