diff --git a/pkgs/development/compilers/sbcl/bootstrap.nix b/pkgs/development/compilers/sbcl/bootstrap.nix
index f8352f0a362..200293c6f51 100644
--- a/pkgs/development/compilers/sbcl/bootstrap.nix
+++ b/pkgs/development/compilers/sbcl/bootstrap.nix
@@ -23,7 +23,6 @@ let
       sha256 = "0sp5445rbvms6qvzhld0kwwvydw51vq5iaf4kdqsf2d9jvaz3yx5";
     };
     armv6l-linux = armv7l-linux;
-    x86_64-solaris = x86_64-linux;
     x86_64-freebsd = rec {
       version = "1.2.7";
       system = "x86-64-freebsd";
@@ -32,6 +31,7 @@ let
   };
   cfg = options.${stdenv.system};
 in
+assert builtins.hasAttr stdenv.system options;
 stdenv.mkDerivation rec {
   name    = "sbcl-bootstrap-${version}";
   version = cfg.version;