Index: devel/git-lfs/Makefile
===================================================================
--- devel/git-lfs/Makefile	(revision 463453)
+++ devel/git-lfs/Makefile	(working copy)
@@ -2,7 +2,7 @@
 
 PORTNAME=	git-lfs
 DISTVERSIONPREFIX=	v
-DISTVERSION=	2.3.4
+DISTVERSION=	2.4.0
 CATEGORIES=	devel
 
 MAINTAINER=	kenji@k2r.org
@@ -20,10 +20,13 @@
 
 GO_PKGNAME=	github.com/${PORTNAME}/${PORTNAME}
 
+# see https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=226320
+GO_ENV+=	GOCACHE=off
+
 # see https://github.com/git-lfs/git-lfs/wiki/Installation
 
 do-build:
-	cd ${WRKSRC} && ${MKDIR} ${WRKSRC}/.tmp && TMPDIR=${WRKSRC}/.tmp script/bootstrap
+	cd ${WRKSRC} && ${MKDIR} ${WRKSRC}/.tmp && ${SETENV} ${MAKE_ENV} ${GO_ENV} TMPDIR=${WRKSRC}/.tmp script/bootstrap
 
 pre-install:
 	${INSTALL_PROGRAM} ${WRKSRC}/bin/git-lfs ${STAGEDIR}${PREFIX}/bin/git-lfs
Index: devel/git-lfs/distinfo
===================================================================
--- devel/git-lfs/distinfo	(revision 463453)
+++ devel/git-lfs/distinfo	(working copy)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1508409891
-SHA256 (git-lfs-git-lfs-v2.3.4_GH0.tar.gz) = 2594fe7bd8cc29d71effd087623b78cadab04a74e506ceeb4971a4ed9a7fbb94
-SIZE (git-lfs-git-lfs-v2.3.4_GH0.tar.gz) = 747313
+TIMESTAMP = 1520134965
+SHA256 (git-lfs-git-lfs-v2.4.0_GH0.tar.gz) = 3f26cd020a965f61c8e8f124a02794d86f46f2fc4627288afe70ed43f398b121
+SIZE (git-lfs-git-lfs-v2.4.0_GH0.tar.gz) = 787610