diff --git a/dagger/client.go b/dagger/client.go
index da23e426..0dc4f1b0 100644
--- a/dagger/client.go
+++ b/dagger/client.go
@@ -90,7 +90,6 @@ func (c *Client) LocalDirs() ([]string, error) {
 }
 
 func (c *Client) BootScript() (*Script, error) {
-	debugf("compiling boot script: %q\n", c.boot)
 	cc := &Compiler{}
 	src, err := cc.Compile("boot.cue", c.boot)
 	if err != nil {
@@ -147,6 +146,7 @@ func (c *Client) buildfn(ctx context.Context, ch chan *bk.SolveStatus, w io.Writ
 			close(ch)
 			return errors.Wrap(err, "serialize boot script")
 		}
+		debugf("client: assembled boot script: %s\n", bootSource)
 		// Setup solve options
 		opts := bk.SolveOpt{
 			FrontendAttrs: map[string]string{
@@ -193,7 +193,6 @@ func (c *Client) outputfn(_ context.Context, r io.Reader, out *Value) func() err
 		defer debugf("outputfn complete")
 		tr := tar.NewReader(r)
 		for {
-			debugf("outputfn: reading next tar entry")
 			h, err := tr.Next()
 			if err == io.EOF {
 				break
@@ -301,9 +300,12 @@ func (c *Client) printfn(ctx context.Context, ch, ch2 chan *bk.SolveStatus) func
 					len(status.Logs),
 				)
 				for _, v := range status.Vertexes {
+					// FIXME: insert raw buildkit telemetry here (ie for debugging, etc.)
+
+					// IF a buildkit vertex has a valid cue path as name, extract additional info:
 					p := cue.ParsePath(v.Name)
 					if err := p.Err(); err != nil {
-						debugf("ignoring buildkit vertex %q: not a valid cue path", v.Name)
+						// Not a valid cue path: skip.
 						continue
 					}
 					n := &Node{
diff --git a/dagger/compute.go b/dagger/compute.go
index 787b3d6a..046e0b0a 100644
--- a/dagger/compute.go
+++ b/dagger/compute.go
@@ -19,7 +19,6 @@ func Compute(ctx context.Context, c bkgw.Client) (r *bkgw.Result, err error) {
 			debugf("execute returned an error. Wrapping...")
 		}
 	}()
-	debugf("initializing env")
 	// Retrieve boot script form client
 	env, err := NewEnv(ctx, NewSolver(c), getBootScript(c), getInput(c))
 	if err != nil {
diff --git a/dagger/env.go b/dagger/env.go
index e21980eb..66edaa11 100644
--- a/dagger/env.go
+++ b/dagger/env.go
@@ -28,6 +28,7 @@ type Env struct {
 
 // Initialize a new environment
 func NewEnv(ctx context.Context, s Solver, bootsrc, inputsrc string) (*Env, error) {
+	debugf("NewEnv(boot=%q input=%q)", bootsrc, inputsrc)
 	cc := &Compiler{}
 	// 1. Compile & execute boot script
 	boot, err := cc.CompileScript("boot.cue", bootsrc)
@@ -55,6 +56,9 @@ func NewEnv(ctx context.Context, s Solver, bootsrc, inputsrc string) (*Env, erro
 	if _, err := base.Merge(input); err != nil {
 		return nil, errors.Wrap(err, "merge base & input")
 	}
+
+	debugf("ENV: base=%q input=%q", base.JSON(), input.JSON())
+
 	return &Env{
 		base:  base,
 		input: input,
diff --git a/dagger/spec.go b/dagger/spec.go
index ca2db4ec..f84b93d0 100644
--- a/dagger/spec.go
+++ b/dagger/spec.go
@@ -18,7 +18,7 @@ func (s Spec) Validate(v *Value, defpath string) (err error) {
 	// FIXME: there is probably a cleaner way to do this.
 	defer func() {
 		if err != nil {
-			debugf("ERROR while validating %v against %v err=%q", v, defpath, err)
+			//debugf("ERROR while validating %v against %v err=%q", v, defpath, err)
 			err = fmt.Errorf("%s", cueerrors.Details(err, nil))
 		}
 	}()
@@ -33,7 +33,6 @@ func (s Spec) Validate(v *Value, defpath string) (err error) {
 	if err := merged.Err(); err != nil {
 		return err
 	}
-	debugf("Validating %v against %v", v, def)
 	if err := merged.Validate(cue.Final()); err != nil {
 		return err
 	}