busybox-sandbox-shell: replace pkgsStatic with useMusl (#314845)

pkgs/os-specific/linux/busybox/sandbox-shell.nix

@@ -1,9 +1,12 @@
-{ busybox}:
+{ lib, stdenv, busybox, musl }:
 
 # Minimal shell for use as basic /bin/sh in sandbox builds
 busybox.override {
   enableStatic = true;
   enableMinimal = true;
+
+  useMusl = stdenv.hostPlatform.isGnu && lib.meta.availableOn stdenv.hostPlatform musl;
+
   extraConfig = ''
     CONFIG_FEATURE_FANCY_ECHO y
     CONFIG_FEATURE_SH_MATH y

pkgs/top-level/all-packages.nix

@@ -12329,12 +12329,7 @@ with pkgs;
       overrideCC stdenv buildPackages.llvmPackages.clangNoLibcxx
     else stdenv;
   };
-  busybox-sandbox-shell = callPackage ../os-specific/linux/busybox/sandbox-shell.nix {
-    # musl roadmap has RISC-V support projected for 1.1.20
-    busybox = if !stdenv.hostPlatform.isRiscV && !stdenv.hostPlatform.isLoongArch64 && stdenv.hostPlatform.libc != "bionic"
-              then pkgsStatic.busybox
-              else busybox;
-  };
+  busybox-sandbox-shell = callPackage ../os-specific/linux/busybox/sandbox-shell.nix { };
 
   cm-rgb = python3Packages.callPackage ../tools/system/cm-rgb { };