diff --git a/main.go b/main.go
index 1a4cbf1..1364b06 100644
--- a/main.go
+++ b/main.go
@@ -390,6 +390,15 @@ func (b *BuildManager) syncWorker(ctx context.Context) error {
 			var slowQueue []*ProtoPackage
 
 			for _, pkg := range queue {
+				eligible, err := pkg.isEligible(ctx)
+				if err != nil {
+					log.Warningf("Unable to determine package status for package %s: %v", pkg.Pkgbase, err)
+				}
+				if !eligible {
+					log.Debugf("skipped package %s (%v)", pkg.Pkgbase, err)
+					continue
+				}
+
 				if pkg.Priority() >= float64(conf.Build.SlowQueueThreshold) {
 					slowQueue = append(slowQueue, pkg)
 				} else {
@@ -397,7 +406,7 @@ func (b *BuildManager) syncWorker(ctx context.Context) error {
 				}
 			}
 
-			if len(fastQueue) == 0 {
+			if len(fastQueue) > 0 && len(slowQueue) > 0 {
 				log.Infof("Skipping slowQueue=%d in favor of fastQueue=%d", len(slowQueue), len(fastQueue))
 				slowQueue = []*ProtoPackage{}
 			}
diff --git a/proto_package.go b/proto_package.go
index 91f1810..bab4323 100644
--- a/proto_package.go
+++ b/proto_package.go
@@ -37,7 +37,7 @@ type ProtoPackage struct {
 	DbPackage *ent.DbPackage
 }
 
-func (p ProtoPackage) isEligible(ctx context.Context) (bool, error) {
+func (p *ProtoPackage) isEligible(ctx context.Context) (bool, error) {
 	if err := p.genSrcinfo(); err != nil {
 		return false, fmt.Errorf("error generating SRCINFO: %w", err)
 	}
@@ -77,7 +77,7 @@ func (p ProtoPackage) isEligible(ctx context.Context) (bool, error) {
 		p.DbPackage = p.DbPackage.Update().SetUpdated(time.Now()).SetVersion(p.Version).
 			SetPackages(packages2slice(p.Srcinfo.Packages)).SetStatus(p.DbPackage.Status).
 			SetSkipReason(p.DbPackage.SkipReason).SetHash(p.Hash).SaveX(ctx)
-		return false, nil
+		return false, fmt.Errorf("skipped package: %s", p.DbPackage.SkipReason)
 	} else {
 		p.DbPackage = p.DbPackage.Update().SetUpdated(time.Now()).SetPackages(packages2slice(p.Srcinfo.Packages)).SetVersion(p.Version).SaveX(ctx)
 	}
@@ -300,11 +300,15 @@ func (p *ProtoPackage) build(ctx context.Context) (time.Duration, error) {
 }
 
 func (p *ProtoPackage) Priority() float64 {
+	if p.DbPackage == nil {
+		return 0
+	}
+
 	if p.DbPackage.BuildTimeEnd.IsZero() {
 		return 0
 	} else {
-		time := p.DbPackage.BuildTimeEnd.Sub(p.DbPackage.BuildTimeStart)
-		return time.Minutes()
+		nTime := p.DbPackage.BuildTimeEnd.Sub(p.DbPackage.BuildTimeStart)
+		return nTime.Minutes()
 	}
 }
 
diff --git a/rm_chroot.py b/rm_chroot.py
new file mode 100644
index 0000000..81bc89a
--- /dev/null
+++ b/rm_chroot.py
@@ -0,0 +1,18 @@
+#!/usr/bin/env python3
+
+import os
+import sys
+from pathlib import Path
+
+SAVE_PATH = "/path/to/workdir"
+
+try:
+    chroot_abs = Path(sys.argv[1]).resolve(True)
+except:
+    print("path does not resolve")
+    sys.exit(1)
+
+if str(chroot_abs).startswith(SAVE_PATH):
+    os.system("rm -rf " + str(chroot_abs))
+else:
+    sys.exit(2)
diff --git a/utils.go b/utils.go
index 12160d5..11f4d1c 100644
--- a/utils.go
+++ b/utils.go
@@ -168,7 +168,8 @@ func cleanBuildDir(dir string, chrootDir string) error {
 
 	if chrootDir != "" {
 		if stat, err := os.Stat(chrootDir); err == nil && stat.IsDir() {
-			err = os.RemoveAll(chrootDir)
+			rmCmd := exec.Command("rm_chroot.py", chrootDir)
+			_, err := rmCmd.CombinedOutput()
 			if err != nil {
 				return err
 			}