Determine current user without CGO.

provisioner/ansible/provisioner.go

@@ -15,7 +15,6 @@ import (
 	"net"
 	"os"
 	"os/exec"
-	"os/user"
 	"path/filepath"
 	"regexp"
 	"strconv"
@@ -122,12 +121,10 @@ func (p *Provisioner) Prepare(raws ...interface{}) error {
 	}
 
 	if p.config.User == "" {
-		u, err := user.Current()
-		if err != nil {
-			errs = packer.MultiErrorAppend(errs, err)
-		} else {
-			p.config.User = u.Username
-		}
+		p.config.User = os.Getenv("USER")
+	}
+	if p.config.User == "" {
+		errs = packer.MultiErrorAppend(errs, fmt.Errorf("user: could not determine current user from environment."))
 	}
 
 	if errs != nil && len(errs.Errors) > 0 {

scripts/build.sh

@@ -35,7 +35,6 @@ mkdir -p bin/
 echo "==> Building..."
 set +e
 gox \
-    -cgo \
     -os="${XC_OS}" \
     -arch="${XC_ARCH}" \
     -ldflags "-X main.GitCommit ${GIT_COMMIT}${GIT_DIRTY}" \