diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index cb3d37d1..51b9e603 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -13,6 +13,7 @@ jobs:
           - macos-latest
           - windows-latest
         go:
+          - '1.17.0-rc2'
           - '1.16'
           - '1.15'
           - '1.14'
@@ -24,6 +25,7 @@ jobs:
         uses: actions/setup-go@v2
         with:
           go-version: ${{ matrix.go }}
+          stable: false # for Go 1.17.0-rc2, it's not stable now. (2021-08-03)
 
       - name: checkout
         uses: actions/checkout@v2
diff --git a/fen.go b/fen.go
index ced39cb8..b3ac3d8f 100644
--- a/fen.go
+++ b/fen.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build solaris
 // +build solaris
 
 package fsnotify
diff --git a/fsnotify.go b/fsnotify.go
index 89cab046..0f4ee52e 100644
--- a/fsnotify.go
+++ b/fsnotify.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 // Package fsnotify provides a platform-independent interface for file system notifications.
diff --git a/fsnotify_test.go b/fsnotify_test.go
index f9771d9d..51aa49c5 100644
--- a/fsnotify_test.go
+++ b/fsnotify_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9
 // +build !plan9
 
 package fsnotify
diff --git a/inotify.go b/inotify.go
index c56556f4..eb87699b 100644
--- a/inotify.go
+++ b/inotify.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
 // +build linux
 
 package fsnotify
diff --git a/inotify_poller.go b/inotify_poller.go
index b33f2b4d..e9ff9439 100644
--- a/inotify_poller.go
+++ b/inotify_poller.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
 // +build linux
 
 package fsnotify
diff --git a/inotify_poller_test.go b/inotify_poller_test.go
index 26623efe..c7475454 100644
--- a/inotify_poller_test.go
+++ b/inotify_poller_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
 // +build linux
 
 package fsnotify
diff --git a/inotify_test.go b/inotify_test.go
index 2c11d2ed..90c82b8e 100644
--- a/inotify_test.go
+++ b/inotify_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build linux
 // +build linux
 
 package fsnotify
diff --git a/integration_test.go b/integration_test.go
index 7096344d..fc09e03f 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build !plan9 && !solaris
 // +build !plan9,!solaris
 
 package fsnotify
diff --git a/kqueue.go b/kqueue.go
index 86e76a3d..368f5b79 100644
--- a/kqueue.go
+++ b/kqueue.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build freebsd || openbsd || netbsd || dragonfly || darwin
 // +build freebsd openbsd netbsd dragonfly darwin
 
 package fsnotify
diff --git a/open_mode_bsd.go b/open_mode_bsd.go
index 2306c462..36cc3845 100644
--- a/open_mode_bsd.go
+++ b/open_mode_bsd.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build freebsd || openbsd || netbsd || dragonfly
 // +build freebsd openbsd netbsd dragonfly
 
 package fsnotify
diff --git a/open_mode_darwin.go b/open_mode_darwin.go
index 870c4d6d..98cd8476 100644
--- a/open_mode_darwin.go
+++ b/open_mode_darwin.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build darwin
 // +build darwin
 
 package fsnotify
diff --git a/windows.go b/windows.go
index 09436f31..c02b75f7 100644
--- a/windows.go
+++ b/windows.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build windows
 // +build windows
 
 package fsnotify