nixUnstable: add util-linuxMinimal to buildInputs

Fixes an issue in tests where they can fail with `../common.sh: line 92:
unshare: command not found`.

pkgs/tools/package-management/nix/default.nix

@@ -10,7 +10,7 @@ let
 
 common =
   { lib, stdenv, perl, curl, bzip2, sqlite, openssl ? null, xz
-  , bash, coreutils, gzip, gnutar
+  , bash, coreutils, util-linuxMinimal, gzip, gnutar
   , pkg-config, boehmgc, perlPackages, libsodium, brotli, boost, editline, nlohmann_json
   , autoreconfHook, autoconf-archive, bison, flex
   , jq, libarchive, libcpuid
@@ -57,6 +57,7 @@ common =
         ++ lib.optional (stdenv.isLinux || stdenv.isDarwin) libsodium
         ++ lib.optionals is24 [ libarchive gmock lowdown ]
         ++ lib.optional (is24 && stdenv.isx86_64) libcpuid
+        ++ lib.optionals (is24 && stdenv.isLinux) [ util-linuxMinimal ]
         ++ lib.optional withLibseccomp libseccomp
         ++ lib.optional withAWS
             ((aws-sdk-cpp.override {