diff --git a/overlay.nix b/overlay.nix
index 1be5bdf1..1e2f350a 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -39,15 +39,7 @@ let
     nanos6Debug = final.nanos6.override { enableDebug = true; };
     nixtools = callPackage ./pkgs/nixtools/default.nix { };
     nixgen = callPackage ./pkgs/nixgen/default.nix { };
-    nix-portable = callPackage ./pkgs/nix-portable/default.nix {
-      busybox = final.pkgsStatic.busybox;
-      bwrap = final.pkgsStatic.bubblewrap;
-      gnutar = final.pkgsStatic.gnutar;
-      perl = final.pkgsBuildBuild.perl;
-      xz = final.pkgsStatic.xz;
-      zstd = final.pkgsStatic.zstd;
-      bashInteractive = final.pkgsStatic.bashInteractive;
-    };
+    nix-portable = callPackage ./pkgs/nix-portable/default.nix { };
     nix-wrap = callPackage ./pkgs/nix-wrap/default.nix { };
     nodes = callPackage ./pkgs/nodes/default.nix { };
     nosv = callPackage ./pkgs/nosv/default.nix { };
diff --git a/pkgs/nix-portable/default.nix b/pkgs/nix-portable/default.nix
index a1b3c6e7..f0818f3a 100644
--- a/pkgs/nix-portable/default.nix
+++ b/pkgs/nix-portable/default.nix
@@ -1,6 +1,5 @@
 with builtins;
 {
-  bwrap,
   nix,
   proot,
   unzip,
@@ -17,23 +16,25 @@ with builtins;
     "bashInteractive"
   ],
 
-  busybox,
   cacert ? pkgs.cacert,
   compression ? "zstd -19 -T0",
-  gnutar ? pkgs.pkgsStatic.gnutar,
   lib ? pkgs.lib,
-  perl ? pkgs.perl,
   pkgs ? import <nixpkgs> {},
-  xz ? pkgs.pkgsStatic.xz,
-  zstd ? pkgs.pkgsStatic.zstd,
-  nixStatic,
   # hardcode executable to run. Useful when creating a bundle.
   bundledPackage ? null,
-  ...
+
+  nixStatic,
+  busyboxStatic ? pkgs.pkgsStatic.busybox,
+  bwrapStatic ? pkgs.pkgsStatic.bubblewrap,
+  zstdStatic ? pkgs.pkgsStatic.zstd,
+
+  perlBuildBuild ? pkgs.pkgsBuildBuild.perl,
 }@inp:
 with lib;
 let
 
+  perl = perlBuildBuild;
+
   pname =
     if bundledPackage == null
     then "nix-portable"
@@ -100,12 +101,12 @@ let
     export PATH="${out}/bin:\$PATH"
   '';
 
-  caBundleZstd = pkgs.runCommand "cacerts" {} "cat ${cacert}/etc/ssl/certs/ca-bundle.crt | ${inp.zstd}/bin/zstd -19 > $out";
+  caBundleZstd = pkgs.runCommand "cacerts" {} "cat ${cacert}/etc/ssl/certs/ca-bundle.crt | ${zstd}/bin/zstd -19 > $out";
 
-  bwrap = packStaticBin "${inp.bwrap}/bin/bwrap";
+  bwrap = packStaticBin "${bwrapStatic}/bin/bwrap";
   nixStatic = packStaticBin "${inp.nixStatic}/bin/nix";
-  proot = packStaticBin "${inp.proot}/bin/proot";
-  zstd = packStaticBin "${inp.zstd}/bin/zstd";
+  proot = packStaticBin "${inp.proot}/bin/proot"; # TODO: why don't they use Static proot here?
+  zstd = packStaticBin "${zstdStatic}/bin/zstd";
 
   # the default nix store contents to extract when first used
   storeTar = maketar ([ cacert nix nixpkgsSrc ] ++ lib.optional (bundledPackage != null) bundledPackage);
@@ -242,9 +243,9 @@ let
       # install busybox
       mkdir -p \$dir/busybox/bin
       (base64 -d> "\$dir/busybox/bin/busybox" && chmod +x "\$dir/busybox/bin/busybox") << END
-    $(cat ${busybox}/bin/busybox | base64)
+    $(cat ${busyboxStatic}/bin/busybox | base64)
     END
-      busyBins="${toString (attrNames (filterAttrs (d: type: type == "symlink") (readDir "${inp.busybox}/bin")))}"
+      busyBins="${toString (attrNames (filterAttrs (d: type: type == "symlink") (readDir "${busyboxStatic}/bin")))}"
       for bin in \$busyBins; do
         [ ! -e "\$dir/busybox/bin/\$bin" ] && ln -s busybox "\$dir/busybox/bin/\$bin"
       done