makepkg cwtch-git error

$ pacaur -S cwtch-git
:: Package cwtch-git not found in repositories, trying AUR...
:: resolving dependencies...
:: looking for inter-conflicts...

AUR Packages  (1) cwtch-git-latest
Repo Packages (1) tor-0.4.2.7-1

Repo Download Size:    2.53 MiB
Repo Installed Size:  12.42 MiB

:: Proceed with installation? [Y/n] y
:: Retrieving package(s)...
clone complete: /home/gw/.cache/pacaur/cwtch-git
:: View cwtch-git PKGBUILD? [Y/n] y
:: cwtch-git PKGBUILD viewed
:: Checking cwtch-git integrity...
==> Making package: cwtch-git r384.b959bfa-1 (Wed 15 Apr 2020 05:57:32 PM CEST)
==> Retrieving sources...
  -> Found cwtch-server.service
  -> Found cwtch.sysusers
  -> Found cwtch.tmpfiles
==> Validating source files with sha256sums...
    cwtch-server.service ... Passed
    cwtch.sysusers ... Passed
    cwtch.tmpfiles ... Passed
:: Preparing cwtch-git...
==> Making package: cwtch-git r384.b959bfa-1 (Wed 15 Apr 2020 05:57:33 PM CEST)
==> WARNING: Skipping dependency checks.
==> Retrieving sources...
  -> Found cwtch-server.service
  -> Found cwtch.sysusers
  -> Found cwtch.tmpfiles
==> WARNING: Skipping all source file integrity checks.
==> Extracting sources...
==> Starting prepare()...
get "cwtch.im/cwtch": found meta tag get.metaImport{Prefix:"cwtch.im/cwtch", VCS:"git", RepoRoot:"https://git.openprivacy.ca/cwtch.im/cwtch"} at //cwtch.im/cwtch?go-get=1
cwtch.im/cwtch (download)
package cwtch.im/cwtch: no Go files in /home/gw/.cache/pacaur/cwtch-git/src/go/src/cwtch.im/cwtch
go: downloading github.com/c-bata/go-prompt v0.2.3
go: downloading git.openprivacy.ca/openprivacy/log v1.0.0
go: downloading git.openprivacy.ca/openprivacy/libricochet-go v1.0.11
go: downloading git.openprivacy.ca/openprivacy/connectivity v1.1.1
go: downloading cwtch.im/tapir v0.1.18
go: downloading github.com/golang/protobuf v1.3.3
go: downloading github.com/cretz/bine v0.1.1-0.20200124154328-f9f678b84cca
go: downloading golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59
go: downloading github.com/agl/ed25519 v0.0.0-20170116200512-5312a6153412
go: downloading github.com/gtank/merlin v0.1.1
go: downloading github.com/pkg/term v0.0.0-20190109203006-aa71e9d9e942
go: downloading github.com/gtank/ristretto255 v0.1.2
go: downloading github.com/mimoo/StrobeGo v0.0.0-20181016162300-f8f6d4d2b643
go: downloading github.com/mattn/go-runewidth v0.0.8
go: downloading go.etcd.io/bbolt v1.3.4
go: downloading golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e
go: downloading golang.org/x/sys v0.0.0-20200331124033-c3d80250170d
go get: -fix flag is a no-op when using modules
go: downloading github.com/mattn/go-tty v0.0.3
go: downloading github.com/mattn/go-colorable v0.1.6
go: downloading github.com/mattn/go-isatty v0.0.12
go: golang.org/x/crypto upgrade => v0.0.0-20200414173820-0848c9571904
go: golang.org/x/net upgrade => v0.0.0-20200324143707-d3edc9973b7e
go: golang.org/x/sys upgrade => v0.0.0-20200413165638-669c56c373c4
go: github.com/mattn/go-colorable upgrade => v0.1.6
go: github.com/golang/protobuf upgrade => v1.4.0
go: github.com/mattn/go-isatty upgrade => v0.0.12
go: github.com/mattn/go-runewidth upgrade => v0.0.9
go: github.com/agl/ed25519 upgrade => v0.0.0-20200225211852-fd4d107ace12
go: git.openprivacy.ca/openprivacy/connectivity upgrade => v1.1.1
go: downloading golang.org/x/crypto v0.0.0-20200414173820-0848c9571904
go: downloading github.com/golang/protobuf v1.4.0
go: downloading github.com/mattn/go-runewidth v0.0.9
go: downloading github.com/agl/ed25519 v0.0.0-20200225211852-fd4d107ace12
go: downloading golang.org/x/sys v0.0.0-20200413165638-669c56c373c4
go: downloading google.golang.org/protobuf v1.21.0
go: finding module for package github.com/agl/ed25519/extra25519
go: google.golang.org/protobuf upgrade => v1.21.0
go: finding module for package github.com/agl/ed25519/extra25519
../../../../../pkg/mod/git.openprivacy.ca/openprivacy/libricochet-go@v1.0.11/utils/crypto.go:8:2: module github.com/agl/ed25519@latest found (v0.0.0-20200225211852-fd4d107ace12), but does not contain package github.com/agl/ed25519/extra25519
==> ERROR: A failure occurred in prepare().
    Aborting...
:: failed to verify integrity or prepare cwtch-git package