diff --git a/doc/next/7-ports.md b/doc/next/7-ports.md
index 8bea3f8fbc..2b564bf889 100644
--- a/doc/next/7-ports.md
+++ b/doc/next/7-ports.md
@@ -1,2 +1,5 @@
 ## Ports {#ports}
 
+### WebAssembly {#wasm}
+
+The support files for WebAssembly have been moved to `lib/wasm` from `misc/wasm`.
diff --git a/misc/wasm/go_js_wasm_exec b/lib/wasm/go_js_wasm_exec
similarity index 100%
rename from misc/wasm/go_js_wasm_exec
rename to lib/wasm/go_js_wasm_exec
diff --git a/misc/wasm/go_wasip1_wasm_exec b/lib/wasm/go_wasip1_wasm_exec
similarity index 100%
rename from misc/wasm/go_wasip1_wasm_exec
rename to lib/wasm/go_wasip1_wasm_exec
diff --git a/misc/wasm/wasm_exec.js b/lib/wasm/wasm_exec.js
similarity index 100%
rename from misc/wasm/wasm_exec.js
rename to lib/wasm/wasm_exec.js
diff --git a/misc/wasm/wasm_exec_node.js b/lib/wasm/wasm_exec_node.js
similarity index 100%
rename from misc/wasm/wasm_exec_node.js
rename to lib/wasm/wasm_exec_node.js
diff --git a/misc/wasm/wasm_exec.html b/misc/wasm/wasm_exec.html
index 72e64473eb..694b526df1 100644
--- a/misc/wasm/wasm_exec.html
+++ b/misc/wasm/wasm_exec.html
@@ -17,7 +17,7 @@ license that can be found in the LICENSE file.
 	<script src="https://cdn.jsdelivr.net/npm/text-encoding@0.7.0/lib/encoding.min.js"></script>
 	(see https://caniuse.com/#feat=textencoder)
 	-->
-	<script src="wasm_exec.js"></script>
+	<script src="../../lib/wasm/wasm_exec.js"></script>
 	<script>
 		if (!WebAssembly.instantiateStreaming) { // polyfill
 			WebAssembly.instantiateStreaming = async (resp, importObject) => {
diff --git a/src/cmd/distpack/test.go b/src/cmd/distpack/test.go
index 108907d0e6..4f260cb0df 100644
--- a/src/cmd/distpack/test.go
+++ b/src/cmd/distpack/test.go
@@ -73,6 +73,11 @@ var modRules = []testRule{
 	{name: "golang.org/toolchain@*/src/cmd/go/main.go"},
 	{name: "golang.org/toolchain@*/src/bytes/bytes.go"},
 
+	{name: "golang.org/toolchain@*/lib/wasm/go_js_wasm_exec"},
+	{name: "golang.org/toolchain@*/lib/wasm/go_wasip1_wasm_exec"},
+	{name: "golang.org/toolchain@*/lib/wasm/wasm_exec.js"},
+	{name: "golang.org/toolchain@*/lib/wasm/wasm_exec_node.js"},
+
 	{name: "**/.DS_Store", exclude: true},
 	{name: "golang.org/toolchain@*/.git", exclude: true},
 	{name: "golang.org/toolchain@*/.gitattributes", exclude: true},
diff --git a/src/cmd/go/internal/toolchain/select.go b/src/cmd/go/internal/toolchain/select.go
index b20a2332a4..8925c6bd51 100644
--- a/src/cmd/go/internal/toolchain/select.go
+++ b/src/cmd/go/internal/toolchain/select.go
@@ -353,13 +353,20 @@ func Exec(gotoolchain string) {
 			base.Fatalf("download %s: %v", gotoolchain, err)
 		}
 		if info.Mode()&0111 == 0 {
-			// allowExec sets the exec permission bits on all files found in dir.
-			allowExec := func(dir string) {
+			// allowExec sets the exec permission bits on all files found in dir if pattern is the empty string,
+			// or only those files that match the pattern if it's non-empty.
+			allowExec := func(dir, pattern string) {
 				err := filepath.WalkDir(dir, func(path string, d fs.DirEntry, err error) error {
 					if err != nil {
 						return err
 					}
 					if !d.IsDir() {
+						if pattern != "" {
+							if matched, _ := filepath.Match(pattern, d.Name()); !matched {
+								// Skip file.
+								return nil
+							}
+						}
 						info, err := os.Stat(path)
 						if err != nil {
 							return err
@@ -380,12 +387,13 @@ func Exec(gotoolchain string) {
 			// then the check of bin/go above might succeed, the other go command
 			// would skip its own mode-setting, and then the go command might
 			// try to run a tool before we get to setting the bits on pkg/tool.
-			// Setting pkg/tool before bin/go avoids that ordering problem.
+			// Setting pkg/tool and lib before bin/go avoids that ordering problem.
 			// The only other tool the go command invokes is gofmt,
 			// so we set that one explicitly before handling bin (which will include bin/go).
-			allowExec(filepath.Join(dir, "pkg/tool"))
-			allowExec(filepath.Join(dir, "bin/gofmt"))
-			allowExec(filepath.Join(dir, "bin"))
+			allowExec(filepath.Join(dir, "pkg/tool"), "")
+			allowExec(filepath.Join(dir, "lib"), "go_?*_?*_exec")
+			allowExec(filepath.Join(dir, "bin/gofmt"), "")
+			allowExec(filepath.Join(dir, "bin"), "")
 		}
 	}
 
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.aix-ppc64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.aix-ppc64.txt
index e70c4d7185..ba40ef33d6 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.aix-ppc64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.aix-ppc64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-386.txt
index 981334eae9..abed143614 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-amd64.txt
index a01fce844a..34ed03825c 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm.txt
index 0de1cecbab..f399f99897 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm64.txt
index 1ebeadcb9f..947af20b0f 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.android-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-amd64.txt
index 509185322e..19e8c4ab99 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-arm64.txt
index 6b2b132d2d..8da52c69a5 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.darwin-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.dragonfly-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.dragonfly-amd64.txt
index 814180addd..06441291f3 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.dragonfly-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.dragonfly-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-386.txt
index 12e0df493e..82cd5a7a30 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-amd64.txt
index bf470a5a05..b0b0d2894d 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm.txt
index dc32e0edf4..1d4c492b57 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm64.txt
index 4335ba6fc7..b9ec6725b6 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-riscv64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-riscv64.txt
index 6161fe2f81..80a87862c8 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-riscv64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.freebsd-riscv64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.illumos-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.illumos-amd64.txt
index b677457f6e..71ef4ed569 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.illumos-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.illumos-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-amd64.txt
index e8363bcb7f..39e3ce1c24 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-arm64.txt
index 9585966f2a..789cbde7a9 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.ios-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.js-wasm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.js-wasm.txt
index 37fa6c06b7..34af7aa9d4 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.js-wasm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.js-wasm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-386.txt
index ee966385f6..62b88000c4 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-amd64.txt
index 6277341561..d35dd7d7b4 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm.txt
index 678711b1a1..de644691a7 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm64.txt
index bb305ab250..2cd0d9ad46 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-loong64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-loong64.txt
index 52a23d4b4a..fe1b08976f 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-loong64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-loong64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mips64x.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mips64x.txt
index 79fff1322e..40c93aee59 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mips64x.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mips64x.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mipsx.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mipsx.txt
index a725626563..bb5865dc7d 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mipsx.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-mipsx.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64.txt
index f25ae8eddc..c8927f6af9 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64le.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64le.txt
index e22b8ee205..f0f012b9df 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64le.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-ppc64le.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-riscv64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-riscv64.txt
index 2e15fe3cf6..2c6038b053 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-riscv64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-riscv64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-s390x.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-s390x.txt
index 1022ee4935..54f5d9ff1b 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-s390x.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.linux-s390x.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-386.txt
index 8b7b156e44..cf6738ec65 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-amd64.txt
index ebdb407c4c..d4e6b93cd1 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm.txt
index fcacf0800f..0d776d23c7 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm64.txt
index c2bd257cc5..3c22682d07 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.netbsd-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-386.txt
index 965a054f6d..af280c34bd 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-amd64.txt
index 1acb7a3b34..a6807639f4 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm.txt
index 0e47d9cda7..9b1986b406 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm64.txt
index 8c99161865..9adffc2de7 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-arm64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-mips64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-mips64.txt
index 6c7cdfbfe4..f9bfb7cd40 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-mips64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-mips64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-ppc64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-ppc64.txt
index 60c73b7c1a..0bd75a6550 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-ppc64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-ppc64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-riscv64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-riscv64.txt
index 978be3bf78..3b01244538 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-riscv64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.openbsd-riscv64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-386.txt
index 26f720984c..cf3725216d 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-386.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-amd64.txt
index 7cf1ddecb0..2f1e6b9ade 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-arm.txt
index 3c3b6a74b6..f76a36de84 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.plan9-arm.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.solaris-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.solaris-amd64.txt
index a750aaf114..330a904d49 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.solaris-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.solaris-amd64.txt
@@ -12,3 +12,4 @@ echo go1.999testmod here!
 -- bin/gofmt --
 echo i am unused
 -- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-386.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-386.txt
index ca0f7aabb0..65fff4cd42 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-386.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-386.txt
@@ -8,3 +8,5 @@ module golang.org/toolchain
 module golang.org/toolchain
 -- bin/go.bat --
 @echo go1.999testmod here!
+-- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-amd64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-amd64.txt
index 44e16c7a04..a78e7c8879 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-amd64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-amd64.txt
@@ -8,3 +8,5 @@ module golang.org/toolchain
 module golang.org/toolchain
 -- bin/go.bat --
 @echo go1.999testmod here!
+-- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm.txt
index ee4e016943..b734bf98c5 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm.txt
@@ -8,3 +8,5 @@ module golang.org/toolchain
 module golang.org/toolchain
 -- bin/go.bat --
 @echo go1.999testmod here!
+-- pkg/tool/fake --
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm64.txt b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm64.txt
index be3ff80186..b60ffbe903 100644
--- a/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm64.txt
+++ b/src/cmd/go/testdata/mod/golang.org_toolchain_v0.0.1-go1.999testmod.windows-arm64.txt
@@ -8,3 +8,4 @@ module golang.org/toolchain
 module golang.org/toolchain
 -- bin/go.bat --
 @echo go1.999testmod here!
+-- lib/wasm/go_js_wasm_exec --
diff --git a/src/syscall/js/js_test.go b/src/syscall/js/js_test.go
index d6bcc6370d..76fa442442 100644
--- a/src/syscall/js/js_test.go
+++ b/src/syscall/js/js_test.go
@@ -7,7 +7,7 @@
 // To run these tests:
 //
 // - Install Node
-// - Add /path/to/go/misc/wasm to your $PATH (so that "go test" can find
+// - Add /path/to/go/lib/wasm to your $PATH (so that "go test" can find
 //   "go_js_wasm_exec").
 // - GOOS=js GOARCH=wasm go test
 //