diff --git a/pkgs/by-name/so/sollya/package.nix b/pkgs/by-name/so/sollya/package.nix
index f944966ba790..9dc898b36eb6 100644
--- a/pkgs/by-name/so/sollya/package.nix
+++ b/pkgs/by-name/so/sollya/package.nix
@@ -30,6 +30,10 @@ stdenv.mkDerivation rec {
     "--with-xml2-config=${lib.getExe' (lib.getDev libxml2) "xml2-config"}"
   ];
 
+  makeFlags = [
+    "CFLAGS=-std=c17"
+  ];
+
   doCheck = true;
 
   meta = {