diff --git a/driver/driver_bsd.go b/driver/driver_stub.go
similarity index 90%
rename from driver/driver_bsd.go
rename to driver/driver_stub.go
index 51020f5..d964039 100644
--- a/driver/driver_bsd.go
+++ b/driver/driver_stub.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//+build dragonfly freebsd netbsd openbsd
+//+build dragonfly freebsd netbsd openbsd solaris
 
 package driver
 
diff --git a/driver/driver_unix.go b/driver/driver_unix.go
index 797e5d7..76c5463 100644
--- a/driver/driver_unix.go
+++ b/driver/driver_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 package driver
 
@@ -12,16 +12,18 @@
 	"os/exec"
 	"syscall"
 	"time"
+
+	"golang.org/x/sys/unix"
 )
 
 type sysStats struct {
 	N      uint64
-	Rusage syscall.Rusage
+	Rusage unix.Rusage
 }
 
 func InitSysStats(N uint64) sysStats {
 	ss := sysStats{N: N}
-	if err := syscall.Getrusage(0, &ss.Rusage); err != nil {
+	if err := unix.Getrusage(0, &ss.Rusage); err != nil {
 		log.Printf("Getrusage failed: %v", err)
 		ss.N = 0
 		// Deliberately ignore the error.
@@ -36,8 +38,8 @@
 	if vm := getVMPeak(); vm != 0 {
 		res.Metrics["peak-VM-bytes"] = vm
 	}
-	usage := new(syscall.Rusage)
-	if err := syscall.Getrusage(0, usage); err != nil {
+	usage := new(unix.Rusage)
+	if err := unix.Getrusage(0, usage); err != nil {
 		log.Printf("Getrusage failed: %v", err)
 		// Deliberately ignore the error.
 		return
@@ -55,7 +57,7 @@
 		return out.String(), err
 	}
 	t1 := time.Now()
-	usage := cmd.ProcessState.SysUsage().(*syscall.Rusage)
+	usage := fromStdUsage(cmd.ProcessState.SysUsage().(*syscall.Rusage))
 	res.RunTime = uint64(t1.Sub(t0)) / N
 	res.Metrics[prefix+"ns/op"] = res.RunTime
 	res.Metrics[prefix+"user+sys-ns/op"] = cpuTime(usage) / N
@@ -63,7 +65,28 @@
 	return out.String(), nil
 }
 
-func cpuTime(usage *syscall.Rusage) uint64 {
+func cpuTime(usage *unix.Rusage) uint64 {
 	return uint64(usage.Utime.Sec)*1e9 + uint64(usage.Utime.Usec*1e3) +
 		uint64(usage.Stime.Sec)*1e9 + uint64(usage.Stime.Usec)*1e3
 }
+
+func fromStdUsage(su *syscall.Rusage) *unix.Rusage {
+	return &unix.Rusage{
+		Utime:    unix.Timeval{Sec: su.Utime.Sec, Usec: su.Utime.Usec},
+		Stime:    unix.Timeval{Sec: su.Stime.Sec, Usec: su.Stime.Usec},
+		Maxrss:   su.Maxrss,
+		Ixrss:    su.Ixrss,
+		Idrss:    su.Idrss,
+		Isrss:    su.Isrss,
+		Minflt:   su.Minflt,
+		Majflt:   su.Majflt,
+		Nswap:    su.Nswap,
+		Inblock:  su.Inblock,
+		Oublock:  su.Oublock,
+		Msgsnd:   su.Msgsnd,
+		Msgrcv:   su.Msgrcv,
+		Nsignals: su.Nsignals,
+		Nvcsw:    su.Nvcsw,
+		Nivcsw:   su.Nivcsw,
+	}
+}