diff --git a/modules/kexecboot.nix b/modules/kexecboot.nix
index c78b7c9..4538afd 100644
--- a/modules/kexecboot.nix
+++ b/modules/kexecboot.nix
@@ -26,7 +26,6 @@ in {
 
     outputs.boot-sh =
       let
-        inherit (pkgs) kexec-tools;
         inherit (pkgs.lib.trivial) toHexString;
         inherit (config.outputs) squashfs kernel;
         cmdline = concatStringsSep " " config.boot.commandLine;
diff --git a/overlay.nix b/overlay.nix
index 0317039..fc60fc7 100644
--- a/overlay.nix
+++ b/overlay.nix
@@ -17,6 +17,13 @@ extraPkgs // {
   strace = prev.strace.override { libunwind = null; };
 
   kexec-tools = prev.kexec-tools.overrideAttrs(o: {
+    # For kexecboot we copy kexec into a ramdisk on the system being
+    # upgraded from. This is more likely to work if kexec is
+    # statically linked so doesn't have dependencies on store paths that
+    # may not exist on that machine. (We can't nix-copy-closure as
+    # the store may not be on a writable filesystem)
+    LDFLAGS = "-static";
+
     patches = o.patches ++ [
       (fetchpatch {
         # merge user command line options into DTB chosen