diff --git a/hosts/common/programs/modemmanager.nix b/hosts/common/programs/modemmanager.nix
index fc1e5294..a8577637 100644
--- a/hosts/common/programs/modemmanager.nix
+++ b/hosts/common/programs/modemmanager.nix
@@ -4,6 +4,12 @@ let
 in
 {
   sane.programs.modemmanager = {
+    packageUnwrapped = pkgs.modemmanager.overrideAttrs (upstream: {
+       postInstall = (upstream.postInstall or "") + ''
+         sed 's/"root"/"networkmanager"/g' $out/share/dbus-1/system.d/org.freedesktop.ModemManager1.conf \
+           > $out/share/dbus-1/system.d/networkmanager-org.freedesktop.ModemManager1.conf
+       '';
+    });
     # mmcli needs /run/current-system/sw/share/dbus-1 files to function
     enableFor.system = lib.mkIf (builtins.any (en: en) (builtins.attrValues cfg.enableFor.user)) true;
 
diff --git a/hosts/common/programs/networkmanager.nix b/hosts/common/programs/networkmanager.nix
index 11c418c8..85d8c0b5 100644
--- a/hosts/common/programs/networkmanager.nix
+++ b/hosts/common/programs/networkmanager.nix
@@ -17,8 +17,15 @@ in
           #   substituteInPlace src/{core/org.freedesktop.NetworkManager,nm-dispatcher/nm-dispatcher}.conf --replace-fail \
           #     'user="root"' 'user="networkmanager"'
           # '';
-          # remove unused services to prevent any unexpected interactions
+          postInstall = (upstream.postInstall or "") + ''
+            # allow the bus to owned by either root or networkmanager users
+            for f in org.freedesktop.NetworkManager.conf nm-dispatcher.conf ; do
+              sed 's/"root"/"networkmanager"/g' $out/share/dbus-1/system.d/$f \
+                > $out/share/dbus-1/system.d/networkmanager-$f
+            done
+          '';
           postFixup = (upstream.postFixup or "") + ''
+            # remove unused services to prevent any unexpected interactions
             rm $out/etc/systemd/system/{nm-cloud-setup.service,nm-cloud-setup.timer,nm-priv-helper.service}
           '';
         });
diff --git a/hosts/common/programs/wpa_supplicant.nix b/hosts/common/programs/wpa_supplicant.nix
index a44a38d5..e0cae35b 100644
--- a/hosts/common/programs/wpa_supplicant.nix
+++ b/hosts/common/programs/wpa_supplicant.nix
@@ -11,15 +11,19 @@ in
           #   substituteInPlace wpa_supplicant/dbus/dbus-wpa_supplicant.conf --replace-fail \
           #     'user="root"' 'user="networkmanager"'
           # '';
-          # nixpkgs wpa_supplicant generates a dbus file which has a path like
-          # /nix/store/abc-wpa_supplicant/nix/store/abc-wpa_supplicant/sbin/...
-          # upstreaming status: <https://github.com/NixOS/nixpkgs/pull/315346>
-          postInstall = upstream.postInstall + ''
+          postInstall = (upstream.postInstall or "") + ''
+            sed 's/"root"/"networkmanager"/g' $out/share/dbus-1/system.d/dbus-wpa_supplicant.conf \
+              > $out/share/dbus-1/system.d/networkmanager-wpa_supplicant.conf
+          '';
+
+          postFixup = (upstream.postFixup or "") + ''
+            # nixpkgs wpa_supplicant generates a dbus file which has a path like
+            # /nix/store/abc-wpa_supplicant/nix/store/abc-wpa_supplicant/sbin/...
+            # upstreaming status: <https://github.com/NixOS/nixpkgs/pull/315346>
             substituteInPlace $out/share/dbus-1/system-services/* --replace-fail \
               "$out$out" "$out"
-          ''
-          # remove unused services to avoid unexpected interactions
-          + ''
+
+            # remove unused services to avoid unexpected interactions
             rm $out/etc/systemd/system/{wpa_supplicant-nl80211@,wpa_supplicant-wired@,wpa_supplicant@}.service
           '';
         });