diff --git a/extract/extract.go b/extract/extract.go
index 8d1bab08a..77b0f34bd 100644
--- a/extract/extract.go
+++ b/extract/extract.go
@@ -216,6 +216,19 @@ func genContent(dest, importPath, license string, p *types.Package, skip map[str
 		buildTags += ",!windows,!nacl,!plan9"
 	}
 
+	if importPath == "syscall" {
+		// As per https://golang.org/cmd/go/#hdr-Build_constraints,
+		// using GOOS=android also matches tags and files for GOOS=linux,
+		// so exclude it explicitly to avoid collisions (issue #843).
+		// Also using GOOS=illumos matches tags and files for GOOS=solaris.
+		switch os.Getenv("GOOS") {
+		case "android":
+			buildTags += ",!linux"
+		case "illumos":
+			buildTags += ",!solaris"
+		}
+	}
+
 	b := new(bytes.Buffer)
 	data := map[string]interface{}{
 		"Dest":      dest,
diff --git a/interp/build.go b/interp/build.go
index 1f28f1fc6..c1a5e0da5 100644
--- a/interp/build.go
+++ b/interp/build.go
@@ -162,6 +162,7 @@ var knownOs = map[string]bool{
 	"darwin":    true,
 	"dragonfly": true,
 	"freebsd":   true,
+	"illumos":   true,
 	"js":        true,
 	"linux":     true,
 	"nacl":      true,
diff --git a/stdlib/syscall/go1_14_syscall_android_386.go b/stdlib/syscall/go1_14_syscall_android_386.go
index 7951d3540..843de607e 100644
--- a/stdlib/syscall/go1_14_syscall_android_386.go
+++ b/stdlib/syscall/go1_14_syscall_android_386.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.14,!go1.15
+// +build go1.14,!go1.15,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_14_syscall_android_amd64.go b/stdlib/syscall/go1_14_syscall_android_amd64.go
index 67d3f6dc2..7343664ed 100644
--- a/stdlib/syscall/go1_14_syscall_android_amd64.go
+++ b/stdlib/syscall/go1_14_syscall_android_amd64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.14,!go1.15
+// +build go1.14,!go1.15,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_14_syscall_android_arm.go b/stdlib/syscall/go1_14_syscall_android_arm.go
index bee89fa7a..a2d35e80b 100644
--- a/stdlib/syscall/go1_14_syscall_android_arm.go
+++ b/stdlib/syscall/go1_14_syscall_android_arm.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.14,!go1.15
+// +build go1.14,!go1.15,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_14_syscall_android_arm64.go b/stdlib/syscall/go1_14_syscall_android_arm64.go
index 13ea265aa..997ab256c 100644
--- a/stdlib/syscall/go1_14_syscall_android_arm64.go
+++ b/stdlib/syscall/go1_14_syscall_android_arm64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.14,!go1.15
+// +build go1.14,!go1.15,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_14_syscall_illumos_amd64.go b/stdlib/syscall/go1_14_syscall_illumos_amd64.go
index bb2d787a8..d5f74426a 100644
--- a/stdlib/syscall/go1_14_syscall_illumos_amd64.go
+++ b/stdlib/syscall/go1_14_syscall_illumos_amd64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.14,!go1.15
+// +build go1.14,!go1.15,!solaris
 
 package syscall
 
diff --git a/stdlib/syscall/go1_15_syscall_android_386.go b/stdlib/syscall/go1_15_syscall_android_386.go
index e5734a237..95402dcfe 100644
--- a/stdlib/syscall/go1_15_syscall_android_386.go
+++ b/stdlib/syscall/go1_15_syscall_android_386.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.15,!go1.16
+// +build go1.15,!go1.16,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_15_syscall_android_amd64.go b/stdlib/syscall/go1_15_syscall_android_amd64.go
index df5f1bb78..ef40f1d29 100644
--- a/stdlib/syscall/go1_15_syscall_android_amd64.go
+++ b/stdlib/syscall/go1_15_syscall_android_amd64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.15,!go1.16
+// +build go1.15,!go1.16,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_15_syscall_android_arm.go b/stdlib/syscall/go1_15_syscall_android_arm.go
index 96b454b41..c4171eebe 100644
--- a/stdlib/syscall/go1_15_syscall_android_arm.go
+++ b/stdlib/syscall/go1_15_syscall_android_arm.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.15,!go1.16
+// +build go1.15,!go1.16,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_15_syscall_android_arm64.go b/stdlib/syscall/go1_15_syscall_android_arm64.go
index 82a382fc9..6ae0156ec 100644
--- a/stdlib/syscall/go1_15_syscall_android_arm64.go
+++ b/stdlib/syscall/go1_15_syscall_android_arm64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.15,!go1.16
+// +build go1.15,!go1.16,!linux
 
 package syscall
 
diff --git a/stdlib/syscall/go1_15_syscall_illumos_amd64.go b/stdlib/syscall/go1_15_syscall_illumos_amd64.go
index 27c1ca08a..e5179a1bf 100644
--- a/stdlib/syscall/go1_15_syscall_illumos_amd64.go
+++ b/stdlib/syscall/go1_15_syscall_illumos_amd64.go
@@ -1,6 +1,6 @@
 // Code generated by 'github.com/containous/yaegi/extract syscall'. DO NOT EDIT.
 
-// +build go1.15,!go1.16
+// +build go1.15,!go1.16,!solaris
 
 package syscall