diff --git a/cmd/transpile/main.go b/cmd/transpile/main.go
index 84f3293..00c9dee 100644
--- a/cmd/transpile/main.go
+++ b/cmd/transpile/main.go
@@ -73,7 +73,6 @@ func (t *T) ParseArgs() (Command, error) {
 	} else {
 		t.fs = t.BaseFs
 	}
-	log.Println(t.Args, t.fs)
 
 	return cmd, nil
 }
@@ -107,7 +106,6 @@ func (t *T) DumpFile() error {
 
 	switch t.filename {
 	case "puzzle.json", "":
-		// BUG(neale): we need a way to tell the transpiler to strip answers
 		p, err := puzzle.Puzzle()
 		if err != nil {
 			return err
diff --git a/cmd/transpile/main_test.go b/cmd/transpile/main_test.go
index 67c353a..ad79cef 100644
--- a/cmd/transpile/main_test.go
+++ b/cmd/transpile/main_test.go
@@ -3,7 +3,6 @@ package main
 import (
 	"bytes"
 	"encoding/json"
-	"log"
 	"testing"
 
 	"github.com/dirtbags/moth/pkg/transpile"
@@ -27,21 +26,22 @@ YAML body
 func newTestFs() afero.Fs {
 	fs := afero.NewMemMapFs()
 	afero.WriteFile(fs, "cat0/1/puzzle.md", testMothYaml, 0644)
-	afero.WriteFile(fs, "cat0/1/moo.txt", testMothYaml, 0644)
+	afero.WriteFile(fs, "cat0/1/moo.txt", []byte("Moo."), 0644)
 	afero.WriteFile(fs, "cat0/2/puzzle.moth", testMothYaml, 0644)
 	afero.WriteFile(fs, "cat0/3/puzzle.moth", testMothYaml, 0644)
 	afero.WriteFile(fs, "cat0/4/puzzle.md", testMothYaml, 0644)
 	afero.WriteFile(fs, "cat0/5/puzzle.md", testMothYaml, 0644)
 	afero.WriteFile(fs, "cat0/10/puzzle.md", testMothYaml, 0644)
 	afero.WriteFile(fs, "unbroken/1/puzzle.md", testMothYaml, 0644)
+	afero.WriteFile(fs, "unbroken/1/moo.txt", []byte("Moo."), 0644)
 	afero.WriteFile(fs, "unbroken/2/puzzle.md", testMothYaml, 0644)
+	afero.WriteFile(fs, "unbroken/2/moo.txt", []byte("Moo."), 0644)
 	return fs
 }
 
 func (tp T) Run(args ...string) error {
 	tp.Args = append([]string{"transpile"}, args...)
 	command, err := tp.ParseArgs()
-	log.Println(tp.fs)
 	if err != nil {
 		return err
 	}
@@ -81,12 +81,11 @@ func TestEverything(t *testing.T) {
 		t.Error(err)
 	}
 	if stdout.String() != "Moo." {
-		t.Error("Wrong file pulled")
+		t.Error("Wrong file pulled", stdout.String())
 	}
 
 	stdout.Reset()
-	if err := tp.Run("mothball", "-dir=cat0"); err != nil {
-		t.Log(tp.BaseFs)
+	if err := tp.Run("mothball", "-dir=unbroken"); err != nil {
 		t.Log(tp.fs)
 		t.Error(err)
 	}
diff --git a/pkg/transpile/basepath.go b/pkg/transpile/basepath.go
index 60d6f69..c40a3fd 100644
--- a/pkg/transpile/basepath.go
+++ b/pkg/transpile/basepath.go
@@ -18,11 +18,16 @@ type RecursiveBasePathFs struct {
 
 // NewRecursiveBasePathFs returns a new RecursiveBasePathFs.
 func NewRecursiveBasePathFs(source afero.Fs, path string) *RecursiveBasePathFs {
-	return &RecursiveBasePathFs{
-		Fs:     afero.NewBasePathFs(source, path),
+	ret := &RecursiveBasePathFs{
 		source: source,
 		path:   path,
 	}
+	if path == "" {
+		ret.Fs = source
+	} else {
+		ret.Fs = afero.NewBasePathFs(source, path)
+	}
+	return ret
 }
 
 // RealPath returns the real path to a file, "breaking out" of the RecursiveBasePathFs.
diff --git a/pkg/transpile/category_test.go b/pkg/transpile/category_test.go
index 575c056..80eac5a 100644
--- a/pkg/transpile/category_test.go
+++ b/pkg/transpile/category_test.go
@@ -63,6 +63,12 @@ func TestOsFsCategory(t *testing.T) {
 		t.Error("Wrong authors", p.Pre.Authors)
 	}
 
+	if p, err := static.Puzzle(3); err != nil {
+		t.Error(err)
+	} else if len(p.Pre.Authors) != 1 {
+		t.Error("Wrong authors", p.Pre.Authors)
+	}
+
 	generated := NewFsCategory(fs, "generated")
 
 	if inv, err := generated.Inventory(); err != nil {
diff --git a/pkg/transpile/mothball.go b/pkg/transpile/mothball.go
index 2126f9f..1ef87f2 100644
--- a/pkg/transpile/mothball.go
+++ b/pkg/transpile/mothball.go
@@ -6,7 +6,6 @@ import (
 	"encoding/json"
 	"fmt"
 	"io"
-	"log"
 )
 
 // Mothball packages a Category up for a production server run.
@@ -36,7 +35,6 @@ func Mothball(c Category) (*bytes.Reader, error) {
 		if err != nil {
 			return nil, err
 		}
-		log.Println(puzzlePath)
 		puzzle, err := c.Puzzle(points)
 		if err != nil {
 			return nil, err
diff --git a/pkg/transpile/mothball_test.go b/pkg/transpile/mothball_test.go
index 8430506..753d536 100644
--- a/pkg/transpile/mothball_test.go
+++ b/pkg/transpile/mothball_test.go
@@ -3,18 +3,32 @@ package transpile
 import (
 	"archive/zip"
 	"io/ioutil"
+	"os"
+	"path"
+	"runtime"
 	"testing"
 
 	"github.com/spf13/afero"
 	"github.com/spf13/afero/zipfs"
 )
 
-func TestMothballs(t *testing.T) {
+func TestMothballsMemFs(t *testing.T) {
+	static := NewFsCategory(newTestFs(), "cat1")
+	if _, err := Mothball(static); err != nil {
+		t.Error(err)
+	}
+}
+
+func TestMothballsOsFs(t *testing.T) {
+	_, testfn, _, _ := runtime.Caller(0)
+	os.Chdir(path.Dir(testfn))
+
 	fs := NewRecursiveBasePathFs(afero.NewOsFs(), "testdata")
 	static := NewFsCategory(fs, "static")
 	mb, err := Mothball(static)
 	if err != nil {
 		t.Error(err)
+		return
 	}
 
 	mbr, err := zip.NewReader(mb, int64(mb.Len()))
diff --git a/pkg/transpile/puzzle.go b/pkg/transpile/puzzle.go
index 8feb56d..11f6b9c 100644
--- a/pkg/transpile/puzzle.go
+++ b/pkg/transpile/puzzle.go
@@ -338,14 +338,18 @@ type FsCommandPuzzle struct {
 	timeout time.Duration
 }
 
-// Puzzle returns a Puzzle struct for the current puzzle.
-func (fp FsCommandPuzzle) Puzzle() (Puzzle, error) {
+func (fp FsCommandPuzzle) run(args ...string) ([]byte, error) {
 	ctx, cancel := context.WithTimeout(context.Background(), fp.timeout)
 	defer cancel()
 
-	cmd := exec.CommandContext(ctx, fp.command)
+	cmd := exec.CommandContext(ctx, "./"+path.Base(fp.command), args...)
 	cmd.Dir = path.Dir(fp.command)
-	stdout, err := cmd.Output()
+	return cmd.Output()
+}
+
+// Puzzle returns a Puzzle struct for the current puzzle.
+func (fp FsCommandPuzzle) Puzzle() (Puzzle, error) {
+	stdout, err := fp.run()
 	if exiterr, ok := err.(*exec.ExitError); ok {
 		return Puzzle{}, errors.New(string(exiterr.Stderr))
 	} else if err != nil {
@@ -375,13 +379,8 @@ func (c nopCloser) Close() error {
 // Open returns a newly-opened file.
 // BUG(neale): FsCommandPuzzle.Open() reads everything into memory, and will suck for large files.
 func (fp FsCommandPuzzle) Open(filename string) (ReadSeekCloser, error) {
-	ctx, cancel := context.WithTimeout(context.Background(), fp.timeout)
-	defer cancel()
-
-	cmd := exec.CommandContext(ctx, fp.command, "--file", filename)
-	cmd.Dir = path.Dir(fp.command)
-	out, err := cmd.Output()
-	buf := nopCloser{bytes.NewReader(out)}
+	stdout, err := fp.run("--file", filename)
+	buf := nopCloser{bytes.NewReader(stdout)}
 	if err != nil {
 		return buf, err
 	}
@@ -391,18 +390,13 @@ func (fp FsCommandPuzzle) Open(filename string) (ReadSeekCloser, error) {
 
 // Answer checks whether the given answer is correct.
 func (fp FsCommandPuzzle) Answer(answer string) bool {
-	ctx, cancel := context.WithTimeout(context.Background(), fp.timeout)
-	defer cancel()
-
-	cmd := exec.CommandContext(ctx, fp.command, "--answer", answer)
-	cmd.Dir = path.Dir(fp.command)
-	out, err := cmd.Output()
+	stdout, err := fp.run("--answer", answer)
 	if err != nil {
 		log.Printf("ERROR: checking answer: %s", err)
 		return false
 	}
 
-	switch strings.TrimSpace(string(out)) {
+	switch strings.TrimSpace(string(stdout)) {
 	case "correct":
 		return true
 	}
diff --git a/pkg/transpile/puzzle_test.go b/pkg/transpile/puzzle_test.go
index 914624e..288cde5 100644
--- a/pkg/transpile/puzzle_test.go
+++ b/pkg/transpile/puzzle_test.go
@@ -28,6 +28,19 @@ func TestPuzzle(t *testing.T) {
 		if p.Pre.Body != "<p>YAML body</p>\n" {
 			t.Errorf("Body parsed wrong: %#v", p.Pre.Body)
 		}
+
+		f, err := pd.Open("moo.txt")
+		if err != nil {
+			t.Error(err)
+		}
+		defer f.Close()
+		buf := new(bytes.Buffer)
+		if _, err := io.Copy(buf, f); err != nil {
+			t.Error(err)
+		}
+		if buf.String() != "Moo." {
+			t.Error("Attachment wrong: ", buf.String())
+		}
 	}
 
 	{