diff --git a/pkgs/by-name/sw/swig/package.nix b/pkgs/by-name/sw/swig/package.nix
index 1ccaf4fb13fe..8ecb4c2fc243 100644
--- a/pkgs/by-name/sw/swig/package.nix
+++ b/pkgs/by-name/sw/swig/package.nix
@@ -20,12 +20,13 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-VlUsiRZLScmbC7hZDzKqUr9481YXVwo0eXT/jy6Fda8=";
   };
 
-  PCRE_CONFIG = "${pcre2.dev}/bin/pcre-config";
+  strictDeps = true;
   nativeBuildInputs = [
     autoconf
     automake
     libtool
     bison
+    pcre2
   ];
   buildInputs = [ pcre2 ];