diff --git a/pkgs/applications/science/chemistry/siesta/default.nix b/pkgs/applications/science/chemistry/siesta/default.nix
index 2a10942d8880..348fdaee60f4 100644
--- a/pkgs/applications/science/chemistry/siesta/default.nix
+++ b/pkgs/applications/science/chemistry/siesta/default.nix
@@ -52,6 +52,7 @@ stdenv.mkDerivation (finalAttrs: {
   NIX_LDFLAGS = "-lm";
 
   cmakeFlags = [
+    "-DCMAKE_POLICY_VERSION_MINIMUM=3.5"
     "-DCMAKE_INSTALL_INCLUDEDIR=include"
     "-DCMAKE_INSTALL_LIBDIR=lib"
   ];