diff --git a/src/core/adb.rs b/src/core/adb.rs
index 1062c1c..082726d 100644
--- a/src/core/adb.rs
+++ b/src/core/adb.rs
@@ -37,7 +37,6 @@
 //! For comprehensive info about ADB,
 //! [see this](https://android.googlesource.com/platform/packages/modules/adb/+/refs/heads/master/docs/)
 
-use crate::core::sync::User;
 use regex::Regex;
 use serde::{Deserialize, Serialize};
 use static_init::dynamic;
@@ -200,11 +199,8 @@ impl ToString for PmLsPackFlag {
     }
 }
 
-pub const PACK_PREFIX: &str = "package:";
-#[expect(clippy::cast_possible_truncation, reason = "")]
-pub const PACK_URI_LEN: u8 = PACK_PREFIX.len() as _;
+const PACK_PREFIX: &str = "package:";
 
-pub const PM_LIST_PACKS: &str = "pm list packages";
 pub const PM_CLEAR_PACK: &str = "pm clear";
 
 /// Builder for an Android Package Manager command.
@@ -224,23 +220,23 @@ impl PmCmd {
     pub fn ls_packs(
         mut self,
         f: Option<PmLsPackFlag>,
-        u: Option<User>,
+        user_id: Option<u16>,
     ) -> Result<Vec<String>, String> {
         let cmd = &mut self.0 .0 .0;
         cmd.args(["list", "packages", "-s"]);
         if let Some(s) = f {
             cmd.arg(s.to_str());
         };
-        if let Some(u) = u {
+        if let Some(u) = user_id {
             cmd.arg("--user");
-            cmd.arg(u.id.to_string());
+            cmd.arg(u.to_string());
         };
         self.0 .0.run().map(|pack_ls| {
             pack_ls
                 .lines()
                 .map(|p_ln| {
                     debug_assert!(p_ln.starts_with(PACK_PREFIX));
-                    String::from(&p_ln[PACK_URI_LEN as usize..])
+                    String::from(&p_ln[PACK_PREFIX.len()..])
                 })
                 .collect()
         })
@@ -252,9 +248,9 @@ impl PmCmd {
     pub fn ls_packs_valid(
         self,
         f: Option<PmLsPackFlag>,
-        u: Option<User>,
+        user_id: Option<u16>,
     ) -> Result<HashSet<PackId>, String> {
-        Ok(self.ls_packs(f, u)?
+        Ok(self.ls_packs(f, user_id)?
             .into_iter()
             .map(|p| PackId::new(p).expect("One of these is wrong: `PackId` regex, ADB implementation. Or the spec now allows a wider char-set")).collect())
     }
diff --git a/src/core/sync.rs b/src/core/sync.rs
index a3fa7da..dfec448 100644
--- a/src/core/sync.rs
+++ b/src/core/sync.rs
@@ -1,5 +1,5 @@
 use crate::core::{
-    adb::{to_trimmed_utf8, Cmd as AdbCmd, PACK_URI_LEN, PM_CLEAR_PACK, PM_LIST_PACKS},
+    adb::{to_trimmed_utf8, Cmd as AdbCmd, PM_CLEAR_PACK},
     uad_lists::PackageState,
 };
 use crate::gui::{views::list::PackageInfo, widgets::package_row::PackageRow};
@@ -7,7 +7,7 @@ use regex::Regex;
 use retry::{delay::Fixed, retry, OperationResult};
 use serde::{Deserialize, Serialize};
 use static_init::dynamic;
-use std::{collections::HashSet, process::Command};
+use std::process::Command;
 
 #[cfg(target_os = "windows")]
 use std::os::windows::process::CommandExt;
@@ -293,13 +293,12 @@ pub const fn supports_multi_user(dev: &Device) -> bool {
 /// to list associated packages.
 ///
 /// If `device_serial` is empty, it lets ADB choose the default device.
-pub fn is_protected_user(user_id: &str, device_serial: &str) -> bool {
-    adb_cmd(
-        true,
-        device_serial,
-        &format!("{PM_LIST_PACKS} -s --user {user_id}"),
-    )
-    .is_err()
+pub fn is_protected_user<S: AsRef<str>>(user_id: u16, device_serial: S) -> bool {
+    AdbCmd::new()
+        .sh(device_serial)
+        .pm()
+        .ls_packs(None, Some(user_id))
+        .is_err()
 }
 
 /// `pm list users` parsed into a vec with extra info.
@@ -319,11 +318,11 @@ pub fn ls_users_parsed(device_serial: &str) -> Vec<User> {
             // It seems each line is a user,
             // optionally associated with a work-profile.
             // This will ignore the work-profiles!
-            let u = &RE.captures(&user).expect("Each user should have an ID")[1];
+            let u = RE.captures(&user).expect("Each user should have an ID")[1]
+                .parse()
+                .unwrap_or_else(|_| unreachable!("User ID must be valid `u16`"));
             User {
-                id: u
-                    .parse()
-                    .unwrap_or_else(|_| unreachable!("User ID must be valid `u16`")),
+                id: u,
                 index: i,
                 protected: is_protected_user(u, device_serial),
             }
diff --git a/src/core/utils.rs b/src/core/utils.rs
index 9066a38..7f92d26 100644
--- a/src/core/utils.rs
+++ b/src/core/utils.rs
@@ -1,6 +1,6 @@
 use crate::core::{
     adb::{Cmd as AdbCmd, PmLsPackFlag},
-    sync::{hashset_system_packages, User},
+    sync::User,
     theme::Theme,
     uad_lists::{PackageHashMap, PackageState, Removal, UadList},
 };
@@ -27,7 +27,7 @@ pub enum Error {
 pub fn fetch_packages(
     uad_lists: &PackageHashMap,
     device_serial: &str,
-    user_id: Option<User>,
+    user_id: Option<u16>,
 ) -> Vec<PackageRow> {
     let all_sys_packs = AdbCmd::new()
         .sh(device_serial)
diff --git a/src/gui/views/list.rs b/src/gui/views/list.rs
index 14b466b..ddd6d1a 100644
--- a/src/gui/views/list.rs
+++ b/src/gui/views/list.rs
@@ -868,7 +868,7 @@ impl List {
         } else {
             user_list
                 .iter()
-                .map(|user| fetch_packages(&uad_list, serial, Some(*user)))
+                .map(|user| fetch_packages(&uad_list, serial, Some(user.id)))
                 .collect()
         }
     }