build.rs: Set --cfg=nix_ge_0_28

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/build.rs b/build.rs
index f3f2d9ae42f60bc4414c04a02057abd8aa63b796..64c2269f8137b9272cc412cb12e36e50647d048a 100644 (file)
--- a/build.rs
+++ b/build.rs
@@ -57,7 +57,7 @@ fn main(){
 
   let nix = &nix.version;
   let nix: semver::Version = nix.parse().expect(nix);
-  for test in [">=0.27"] {
+  for test in [">=0.27", ">=0.28"] {
     let cfg = test.replace('.', "_").replace(">=", "ge_");
     let test: semver::VersionReq = test.parse().unwrap();
     if test.matches(&nix) {