Index: head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod.go
===================================================================
--- head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod.go	(revision 499868)
+++ head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod.go	(nonexistent)
@@ -1,8 +0,0 @@
---- src/github.com/concourse/go-archive/tarfs/mknod.go.orig	2019-03-04 10:29:20 UTC
-+++ src/github.com/concourse/go-archive/tarfs/mknod.go
-@@ -1,4 +1,4 @@
--// +build !windows
-+// +build !windows,!freebsd
- 
- package tarfs
- 

Property changes on: head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod.go
___________________________________________________________________
Deleted: fbsd:nokeywords
## -1 +0,0 ##
-yes
\ No newline at end of property
Deleted: svn:eol-style
## -1 +0,0 ##
-native
\ No newline at end of property
Deleted: svn:mime-type
## -1 +0,0 ##
-text/plain
\ No newline at end of property
Index: head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod__freebsd.go
===================================================================
--- head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod__freebsd.go	(revision 499868)
+++ head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod__freebsd.go	(nonexistent)
@@ -1,31 +0,0 @@
---- src/github.com/concourse/go-archive/tarfs/mknod_freebsd.go.orig	2019-03-13 13:08:01 UTC
-+++ src/github.com/concourse/go-archive/tarfs/mknod_freebsd.go
-@@ -0,0 +1,28 @@
-+// +build freebsd
-+
-+package tarfs
-+
-+import (
-+	"archive/tar"
-+	"syscall"
-+
-+	"golang.org/x/sys/unix"
-+)
-+
-+func mknodEntry(hdr *tar.Header, path string) error {
-+	mode := uint32(hdr.Mode & 07777)
-+	switch hdr.Typeflag {
-+	case tar.TypeBlock:
-+		mode |= unix.S_IFBLK
-+	case tar.TypeChar:
-+		mode |= unix.S_IFCHR
-+	case tar.TypeFifo:
-+		mode |= unix.S_IFIFO
-+	}
-+
-+	return syscall.Mknod(path, mode, uint64(mkdev(hdr.Devmajor, hdr.Devminor)))
-+}
-+
-+func mkdev(major, minor int64) uint32 {
-+	return uint32(((minor & 0xfff00) << 12) | ((major & 0xfff) << 8) | (minor & 0xff))
-+}

Property changes on: head/net/concourse-fly/files/patch-src_github.com_concourse_go-archive_tarfs_mknod__freebsd.go
___________________________________________________________________
Deleted: fbsd:nokeywords
## -1 +0,0 ##
-yes
\ No newline at end of property
Deleted: svn:eol-style
## -1 +0,0 ##
-native
\ No newline at end of property
Deleted: svn:mime-type
## -1 +0,0 ##
-text/plain
\ No newline at end of property
Index: head/net/concourse-fly/Makefile
===================================================================
--- head/net/concourse-fly/Makefile	(revision 499868)
+++ head/net/concourse-fly/Makefile	(revision 499869)
@@ -1,66 +1,79 @@
 # $FreeBSD$
 
 PORTNAME=	concourse
-PORTVERSION=	4.2.3
+PORTVERSION=	5.1.0
 CATEGORIES=	net sysutils
 MASTER_SITES=	LOCAL/dumbbell/concourse/
 PKGNAMESUFFIX=	-fly
 
 MAINTAINER=	dumbbell@FreeBSD.org
 COMMENT=	CLI for Concourse
 
 LICENSE=	APACHE20
 
-GO_CMD=		${LOCALBASE}/bin/go
 GO_PKGNAME=	github.com/concourse/fly
+GO_BUILDFLAGS+=	-mod=vendor \
+		-ldflags="-X github.com/concourse/fly/version.Version=${PORTVERSION}"
 
 USES=		go tar:xz
 
 CONFLICTS_INSTALL=	fly
 
 PLIST_FILES=	bin/fly
 
 # The build instructions for `fly` suggest to clone the global Concourse
 # repository, which contains many Git submodules, including fly, and
 # build from there. So basically:
 #
-#     git clone --recursive https://github.com/concourse/concourse.gi
-#     cd concourse
-#     export GOPATH=$PWD
-#     cd src/github.com/concourse/fly
+#     git clone --recursive https://github.com/concourse/concourse.git
+#     cd concourse/fly
 #     go build
 #
-# Therefore, the source archive contains the Concourse top-level
-# repository and all its submodules. It's created using the
-# create-src-archive below:
+# Unfortunately, this is difficult to integrate as is with the Ports framework:
+#   * Some submodules are hosted on services other than GitHub
+#   * Third-party Go dependencies are not Git submodules
 #
+# We created the `create-src-archive` to create a self-contained
+# source archive because the Concourse does not provide one. This
+# source archive contains the Git submodules and the third-party Go
+# dependencies, fetched using `go mod vendor`.
+#
+# It is created using the `create-src-archive` target below:
+#
 #     make create-src-archive
 #
 # Because it doesn't match the project layout USES=go expects, we
 # override the post-extract and do-build targets to adapt the commands.
 #
+# In particular, we must pass `-mod=vendor` to go-install to be able to
+# use the third-party dependencies fetched with `go mod vendor`.
+
 # `fly` version is set by default to "0.0.0-dev" in version/Version.go.
 # Instead of patching the file, we use a linker flag to set the variable
 # to the port's version.
 
 post-extract:
-	${LN} -sf ${WRKSRC}/src ${GO_WRKDIR_SRC}
+	@:
 
 do-build:
-	(cd ${WRKDIR}; \
-	${SETENV} ${MAKE_ENV} ${GO_ENV} ${GO_CMD} \
-		'install' -v -ldflags="-X github.com/concourse/fly/version.Version=${PORTVERSION}" ${GO_TARGET})
+	(cd ${WRKSRC}/fly; \
+		${SETENV} ${MAKE_ENV} ${GO_ENV} ${GO_CMD} 'install' ${GO_BUILDFLAGS})
 
 .PHONY: create-src-archive
 ARCHIVE_DIR=	${DISTDIR}/concourse-${PORTVERSION}
 create-src-archive:
 	${RM} -rf ${ARCHIVE_DIR}
 	git clone --recursive -b v${PORTVERSION} \
 		https://github.com/concourse/concourse.git \
 		${ARCHIVE_DIR}
+	GOPATH=$$(mktemp concourse-gopath.XXXX) && \
+	(cd ${ARCHIVE_DIR} && \
+	 ${GO_CMD} mod vendor) && \
+	${FIND} "$$GOPATH" -exec ${CHMOD} u+w {} \; && \
+	${RM} -rf "$$GOPATH"
 	${FIND} ${ARCHIVE_DIR} \( -name ".git*" -o -name "testdata" \) -depth -exec ${RM} -rf {} \;
 	${TAR} -cf - -C ${ARCHIVE_DIR:H} ${ARCHIVE_DIR:T} | ${XZ_CMD} > ${ARCHIVE_DIR}.tar.xz
 	${RM} -rf ${ARCHIVE_DIR}
 	${MAKE} makesum
 
 .include <bsd.port.mk>
Index: head/net/concourse-fly/distinfo
===================================================================
--- head/net/concourse-fly/distinfo	(revision 499868)
+++ head/net/concourse-fly/distinfo	(revision 499869)
@@ -1,3 +1,3 @@
-TIMESTAMP = 1551695393
-SHA256 (concourse-4.2.3.tar.xz) = 22ae461a4f1f526287611fb45e9f2e93c4437d4b8922195813ff0537082cada0
-SIZE (concourse-4.2.3.tar.xz) = 38355156
+TIMESTAMP = 1556121268
+SHA256 (concourse-5.1.0.tar.xz) = 2d796b621b8d7000a6e84c7c7dd441ee702e0730c09b390cf79319ec217dc885
+SIZE (concourse-5.1.0.tar.xz) = 6738124