diff --git a/main.go b/main.go
index 4cb8111..f4f20d9 100644
--- a/main.go
+++ b/main.go
@@ -20,6 +20,16 @@ import (
 	yaml "gopkg.in/yaml.v3"
 )
 
+var (
+	Debug         = os.Getenv("DEBUG") == "true"
+	ConstTitle    = os.Getenv("YAML_C_TITLE")
+	ConstSeason   = os.Getenv("YAML_C_SEASON")
+	ConstEpisode  = os.Getenv("YAML_C_EPISODE")
+	ConstOutd     = os.Getenv("YAML_O")
+	Dry           = os.Getenv("YAML_D") == "true" || os.Getenv("DRY") == "true"
+	ConstPatterns = os.Getenv("YAML_P")
+)
+
 type Yaml struct {
 	C Fields
 	O string
@@ -158,7 +168,7 @@ func RunWith(ctx context.Context, outd, ind string, patterns []string, overrides
 	}
 	for _, pattern := range patterns {
 		for _, entry := range entries {
-			if !entry.Type().IsRegular() {
+			if !entry.Type().IsRegular() && !(Debug && Dry) {
 				continue
 			}
 			if err := one(ctx, outd, path.Join(ind, entry.Name()), []string{pattern}, overrides, mvNLn); err != nil {
@@ -256,10 +266,16 @@ func DryMvNLn() func(string, string) error {
 	outd := map[string]struct{}{}
 	return func(outf, inf string) error {
 		if _, err := os.Stat(outf); err == nil {
+			if Debug {
+				fmt.Fprintf(os.Stderr, "no mv %q\n      %q\n", inf, outf)
+			}
 			return nil
 		}
 
 		if _, ok := outd[outf]; ok {
+			if Debug {
+				fmt.Fprintf(os.Stderr, "no mv %q\n      %q\n", inf, outf)
+			}
 			return nil
 		}
 		outd[outf] = struct{}{}
@@ -287,26 +303,26 @@ func NewYaml(p string) (Yaml, error) {
 		return y, fmt.Errorf("%s: %w", p, err)
 	}
 
-	if v := os.Getenv("YAML_C_TITLE"); v != "" {
-		y.C.Title = v
+	if ConstTitle != "" {
+		y.C.Title = ConstTitle
 	}
-	if v := os.Getenv("YAML_C_SEASON"); v != "" {
-		y.C.Season = v
+	if ConstSeason != "" {
+		y.C.Season = ConstSeason
 	}
-	if v := os.Getenv("YAML_C_EPISODE"); v != "" {
-		y.C.Episode = v
+	if ConstEpisode != "" {
+		y.C.Episode = ConstEpisode
 	}
 
-	if v := os.Getenv("YAML_O"); v != "" {
-		y.O = v
+	if ConstOutd != "" {
+		y.O = ConstOutd
 	}
 
-	if v := os.Getenv("YAML_D"); v == "true" {
+	if Dry {
 		y.D = true
 	}
 
-	if v := os.Getenv("YAML_P"); v != "" {
-		y.P = strings.Split(v, ",")
+	if ConstPatterns != "" {
+		y.P = strings.Split(ConstPatterns, ",")
 	}
 
 	return y, nil