diff --git a/pkgs/development/libraries/bctoolbox/default.nix b/pkgs/development/libraries/bctoolbox/default.nix
index d18975266462..8187c7587403 100644
--- a/pkgs/development/libraries/bctoolbox/default.nix
+++ b/pkgs/development/libraries/bctoolbox/default.nix
@@ -9,8 +9,8 @@ stdenv.mkDerivation rec {
   pname = "bctoolbox";
   version = "5.1.17";
 
-  nativeBuildInputs = [ cmake bcunit ];
-  buildInputs = [ mbedtls ];
+  nativeBuildInputs = [ cmake ];
+  buildInputs = [ mbedtls bcunit ];
 
   src = fetchFromGitLab {
     domain = "gitlab.linphone.org";
@@ -26,6 +26,8 @@ stdenv.mkDerivation rec {
 
   NIX_CFLAGS_COMPILE = [ "-Wno-error=stringop-truncation" ];
 
+  strictDeps = true;
+
   meta = with lib; {
     description = "Utilities library for Linphone";
     homepage = "https://gitlab.linphone.org/BC/public/bctoolbox";