diff --git a/home-manager/modules/common.nix b/home-manager/modules/common.nix
index 5781e09..b358ad8 100644
--- a/home-manager/modules/common.nix
+++ b/home-manager/modules/common.nix
@@ -239,6 +239,12 @@ in
         packages = with pkgs; [
           pkgs'.mine.nix
         ];
+
+        # Without this, we are at the mercy of whatever version of nix is in $PATH...
+        # TODO: Is this the right thing to do?
+        extraActivationPath = [
+          config.nix.package
+        ];
       };
     })
     (mkIf pkgs.stdenv.isLinux (mkMerge [
@@ -272,7 +278,7 @@ in
         # No targets.genericLinux equivalent apparently
         sessionVariablesExtra =
           ''
-            . "${pkgs.nix}/etc/profile.d/nix.sh"
+            . "${config.nix.package}/etc/profile.d/nix.sh"
           '';
         packages = with pkgs; [
           cacert
diff --git a/nixos/modules/containers.nix b/nixos/modules/containers.nix
index 17f56a5..b4fa612 100644
--- a/nixos/modules/containers.nix
+++ b/nixos/modules/containers.nix
@@ -198,7 +198,7 @@ in
             ''
               if [ ! -e "${sysProfile}" ]; then
                 echo "Creating dummy profile"
-                ${pkgs.nix}/bin/nix-env -p ${sysProfile} --set ${dummyProfile}
+                ${config.nix.package}/bin/nix-env -p ${sysProfile} --set ${dummyProfile}
               fi
             ''}
 
diff --git a/nixos/modules/deploy-rs.nix b/nixos/modules/deploy-rs.nix
index 56201f2..679bead 100644
--- a/nixos/modules/deploy-rs.nix
+++ b/nixos/modules/deploy-rs.nix
@@ -9,7 +9,7 @@ let
   keepGensOpt = with lib.types; mkOpt' ints.unsigned 10
     "Number of generations to keep when cleaning up old deployments (0 to disable deletion on deployment).";
   keepGensSnippet = p: n: optionalString (n > 0) ''
-    ${pkgs.nix}/bin/nix-env -p "${p}" --delete-generations +${toString n}
+    ${config.nix.package}/bin/nix-env -p "${p}" --delete-generations +${toString n}
   '';
 
   # Based on https://github.com/serokell/deploy-rs/blob/master/flake.nix