diff --git a/Makefile b/Makefile
index bf15a8b2..2ad4dcdf 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,7 @@
 NIXOS_VERSION := 19.09
 NIXOS_PREFIX  := $(PREFIX)/etc/nixos
 COMMAND       := test
-FLAGS         := -I "nixpkgs-overlays=$$(pwd)/overlays.nix" \
-				 -I "config=$$(pwd)/config" \
-				 -I "modules=$$(pwd)/modules" $(FLAGS)
+FLAGS         := -I "config=$$(pwd)/config" -I "modules=$$(pwd)/modules" $(FLAGS)
 
 # The real Labowski
 all: channels
diff --git a/default.nix b/default.nix
index a8eb183a..e7a788bd 100644
--- a/default.nix
+++ b/default.nix
@@ -16,9 +16,6 @@ device:
     # So we can use absolute import paths
     "config=/etc/dotfiles/config"
     "modules=/etc/dotfiles/modules"
-    # We define nixpkgs-overlays so our overlays will be available to
-    # nix-shell/nix-build outside of rebuilding...
-    "nixpkgs-overlays=/etc/dotfiles/overlays.nix"
   ];
   # ...but we still need to set nixpkgs.overlays to make them visible to the
   # rebuild process, however...
@@ -27,6 +24,13 @@ device:
 
   # For instant nix-shell scripts
   environment.systemPackages = [ pkgs.my.cached-nix-shell ];
+  environment.shellAliases = {
+    nix-env = "NIXPKGS_ALLOW_UNFREE=1 nix-env";
+    nix-shell = ''NIX_PATH="nixpkgs-overlays=/etc/dotfiles/overlays.nix:$NIX_PATH" nix-shell'';
+    nsh = "nix-shell";
+    nen = "nix-env";
+    dots = "make -C ~/.dotfiles";
+  };
 
   # This value determines the NixOS release with which your system is to be
   # compatible, in order to avoid breaking some software such as database
diff --git a/hosts/default.nix b/hosts/default.nix
index 1dfb4822..aad4d977 100644
--- a/hosts/default.nix
+++ b/hosts/default.nix
@@ -16,17 +16,10 @@
 
   ### My user settings
   my.username = "hlissner";
-  my.env.PATH = [ ../bin ];
   my.user = {
     isNormalUser = true;
     uid = 1000;
     extraGroups = [ "wheel" "video" "networkmanager" ];
     shell = pkgs.zsh;
   };
-  my.alias.nix-env = "NIXPKGS_ALLOW_UNFREE=1 nix-env";
-  my.alias.nsh = "nix-shell";
-  my.alias.nen = "nix-env";
-  my.alias.sc = "systemctl";
-  my.alias.ssc = "sudo systemctl";
-  my.alias.dots = "make -C ~/.dotfiles";
 }
diff --git a/hosts/personal.nix b/hosts/personal.nix
index 9713d787..71da1b9c 100644
--- a/hosts/personal.nix
+++ b/hosts/personal.nix
@@ -1,11 +1,8 @@
 # hosts/personal.nix --- settings common to my personal systems
 
-{ config, pkgs, ... }:
+{ config, lib, pkgs, ... }:
 {
-  imports = [
-    ./.
-    <modules/xdg.nix>
-  ];
+  imports = [ ./. ];
 
   # Support for more filesystems
   environment.systemPackages = with pkgs; [
@@ -29,4 +26,51 @@
     "192.168.1.11" = [ "shiro" ];
     "192.168.1.12" = [ "midori" ];
   };
+
+
+  ### A tidy $HOME is a tidy mind
+  # Obey XDG conventions;
+  my.home.xdg.enable = true;
+  environment.variables = {
+    # These are the defaults, but some applications are buggy when these lack
+    # explicit values.
+    XDG_CONFIG_HOME = "$HOME/.config";
+    XDG_CACHE_HOME  = "$HOME/.cache";
+    XDG_DATA_HOME   = "$HOME/.local/share";
+    XDG_BIN_HOME    = "$HOME/.local/bin";
+  };
+
+  # Conform more programs to XDG conventions. The rest are handled by their
+  # respective modules.
+  my.env = {
+    __GL_SHADER_DISK_CACHE_PATH = "$XDG_CACHE_HOME/nv";
+    CUDA_CACHE_PATH = "$XDG_CACHE_HOME/nv";
+    HISTFILE = "$XDG_DATA_HOME/bash/history";
+    INPUTRC = "$XDG_CACHE_HOME/readline/inputrc";
+    LESSHISTFILE = "$XDG_CACHE_HOME/lesshst";
+    WGETRC = "$XDG_CACHE_HOME/wgetrc";
+    XAUTHORITY = "/tmp/Xauthority";
+  };
+  my.init = "[ -e ~/.Xauthority ] && mv -f ~/.Xauthority \"$XAUTHORITY\"";
+
+  # Prevents ~/.esd_auth files by disabling the esound protocol module for
+  # pulseaudio, which I likely don't need. Is there a better way?
+  hardware.pulseaudio.configFile =
+    let paConfigFile =
+          with pkgs; runCommand "disablePulseaudioEsoundModule"
+            { buildInputs = [ pulseaudio ]; } ''
+              mkdir "$out"
+              cp ${pulseaudio}/etc/pulse/default.pa "$out/default.pa"
+              sed -i -e 's|load-module module-esound-protocol-unix|# ...|' "$out/default.pa"
+            '';
+      in lib.mkIf config.hardware.pulseaudio.enable
+        "${paConfigFile}/default.pa";
+
+  # Clean up leftovers, as much as we can
+  system.activationScripts.clearHome = ''
+    pushd /home/${config.my.username}
+    rm -rf .compose-cache .nv .pki .dbus .fehbg
+    [ -s .xsession-errors ] || rm -f .xsession-errors*
+    popd
+  '';
 }
diff --git a/modules/shell/zsh.nix b/modules/shell/zsh.nix
index fae492d8..76750686 100644
--- a/modules/shell/zsh.nix
+++ b/modules/shell/zsh.nix
@@ -22,6 +22,8 @@
     alias.l   = "exa -1";
     alias.ll  = "exa -l";
     alias.la  = "LC_COLLATE=C exa -la";
+    alias.sc = "systemctl";
+    alias.ssc = "sudo systemctl";
 
     # Write it recursively so other modules can write files to it
     home.xdg.configFile."zsh" = {
diff --git a/modules/xdg.nix b/modules/xdg.nix
deleted file mode 100644
index 971bd5b0..00000000
--- a/modules/xdg.nix
+++ /dev/null
@@ -1,49 +0,0 @@
-# modules/xdg.nix -- a tidy $HOME is a tidy mind
-
-{ config, lib, pkgs, ... }:
-{
-  # Obey XDG conventions;
-  my.home.xdg.enable = true;
-  environment.variables = {
-    # These are the defaults, but some applications are buggy when these lack
-    # explicit values.
-    XDG_CONFIG_HOME = "$HOME/.config";
-    XDG_CACHE_HOME  = "$HOME/.cache";
-    XDG_DATA_HOME   = "$HOME/.local/share";
-    XDG_BIN_HOME    = "$HOME/.local/bin";
-  };
-
-  # Conform more programs to XDG conventions. The rest are handled by their
-  # respective modules.
-  my.env = {
-    __GL_SHADER_DISK_CACHE_PATH = "$XDG_CACHE_HOME/nv";
-    CUDA_CACHE_PATH = "$XDG_CACHE_HOME/nv";
-    HISTFILE = "$XDG_DATA_HOME/bash/history";
-    INPUTRC = "$XDG_CACHE_HOME/readline/inputrc";
-    LESSHISTFILE = "$XDG_CACHE_HOME/lesshst";
-    WGETRC = "$XDG_CACHE_HOME/wgetrc";
-    XAUTHORITY = "/tmp/Xauthority";
-  };
-  my.init = "[ -e ~/.Xauthority ] && mv -f ~/.Xauthority \"$XAUTHORITY\"";
-
-  # Prevents ~/.esd_auth files by disabling the esound protocol module for
-  # pulseaudio, which I likely don't need. Is there a better way?
-  hardware.pulseaudio.configFile =
-    let paConfigFile =
-          with pkgs; runCommand "disablePulseaudioEsoundModule"
-            { buildInputs = [ pulseaudio ]; } ''
-              mkdir "$out"
-              cp ${pulseaudio}/etc/pulse/default.pa "$out/default.pa"
-              sed -i -e 's|load-module module-esound-protocol-unix|# ...|' "$out/default.pa"
-            '';
-      in lib.mkIf config.hardware.pulseaudio.enable
-        "${paConfigFile}/default.pa";
-
-  # Clean up leftovers, as much as we can
-  system.activationScripts.clearHome = ''
-    pushd /home/${config.my.username}
-    rm -rf .compose-cache .nv .pki .dbus .fehbg
-    [ -s .xsession-errors ] || rm -f .xsession-errors*
-    popd
-  '';
-}
diff --git a/options.nix b/options.nix
index 8413a75e..3d8ea379 100644
--- a/options.nix
+++ b/options.nix
@@ -43,6 +43,8 @@ in
       booted. Anything done here should be idempotent and inexpensive.
     '';
   };
+  ## PATH should always start with its old value
+  config.my.env.PATH = [ ./bin "$PATH" ];
   config.environment.extraInit =
     let exportLines = mapAttrsToList (n: v: "export ${n}=\"${v}\"") config.my.env;
     in ''
@@ -84,7 +86,4 @@ in
     # This file is autogenerated, do not edit it!
     ${config.my.zsh.env};
   '';
-
-  ## PATH should always start with its old value
-  config.my.env.PATH = [ "$PATH" ];
 }