diff --git a/build/builder_unix.go b/build/builder_unix.go
index cd50632dd..edbd87b06 100644
--- a/build/builder_unix.go
+++ b/build/builder_unix.go
@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 //
-//go:build !windows
-// +build !windows
+//go:build !windows && !wasm
+// +build !windows,!wasm
 
 package build
 
diff --git a/tombstones_unix.go b/tombstones_unix.go
index e21f42c5f..f983b5096 100644
--- a/tombstones_unix.go
+++ b/tombstones_unix.go
@@ -1,4 +1,4 @@
-//go:build !windows
+//go:build !windows && !wasm
 
 package zoekt