Merge pull request #216596 from yu-re-ka/syncthing-cross

syncthing: fix cross

pkgs/applications/networking/syncthing/default.nix

@@ -1,4 +1,4 @@
-{ buildGoModule, stdenv, lib, procps, fetchFromGitHub, nixosTests }:
+{ pkgsBuildBuild, go, buildGoModule, stdenv, lib, procps, fetchFromGitHub, nixosTests }:
 
 let
   common = { stname, target, postInstall ? "" }:
@@ -22,7 +22,12 @@ let
 
       buildPhase = ''
         runHook preBuild
-        go run build.go -no-upgrade -version v${version} build ${target}
+        (
+          export GOOS="${pkgsBuildBuild.go.GOOS}" GOARCH="${pkgsBuildBuild.go.GOARCH}" CC=$CC_FOR_BUILD
+          go build build.go
+          go generate github.com/syncthing/syncthing/lib/api/auto github.com/syncthing/syncthing/cmd/strelaypoolsrv/auto
+        )
+        ./build -goos ${go.GOOS} -goarch ${go.GOARCH} -no-upgrade -version v${version} build ${target}
         runHook postBuild
       '';