diff --git a/pkgs/by-name/lp/lpcnet/package.nix b/pkgs/by-name/lp/lpcnet/package.nix
index 3737bec91de2..75865e7abb69 100644
--- a/pkgs/by-name/lp/lpcnet/package.nix
+++ b/pkgs/by-name/lp/lpcnet/package.nix
@@ -5,6 +5,7 @@
   fetchurl,
   cmake,
   codec2,
+  sox,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -47,6 +48,13 @@ stdenv.mkDerivation (finalAttrs: {
   ];
 
   doCheck = true;
+  nativeCheckInputs = [
+    # NOTE: From some reason, the tests pass without this on x86_64-linux, but
+    # not on aarch64-linux, although the relevant test is not enabled
+    # conditionally, see:
+    # https://github.com/drowe67/LPCNet/blob/c8e51ac5e2fe674849cb53e7da44689b572cc246/CMakeLists.txt#L220-L225
+    sox
+  ];
 
   meta = {
     description = "Experimental Neural Net speech coding for FreeDV";