diff --git a/magefiles/magefile.go b/magefiles/magefile.go
index 0184f1f..4cbb769 100644
--- a/magefiles/magefile.go
+++ b/magefiles/magefile.go
@@ -7,6 +7,7 @@ import (
 	"os"
 	"path/filepath"
 	"runtime"
+	"time"
 
 	"github.com/magefile/mage/mg"
 	"github.com/magefile/mage/sh"
@@ -23,10 +24,7 @@ func ldflags() (string, error) {
 	if err != nil {
 		commit = "none"
 	}
-	buildDate, err := sh.Output("date", "-u", "+%Y-%m-%dT%H:%M:%SZ")
-	if err != nil {
-		buildDate = "unknown"
-	}
+	buildDate := time.Now().UTC().Format(time.RFC3339)
 	return fmt.Sprintf(
 		`-X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.Version=%s -X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.Commit=%s -X code.beautifulmachines.dev/jakoubek/csv2excel/internal/version.BuildDate=%s`,
 		version, commit, buildDate,