diff --git a/cmd/dep/ensure.go b/cmd/dep/ensure.go
index a90c8da18d..ef35e7f069 100644
--- a/cmd/dep/ensure.go
+++ b/cmd/dep/ensure.go
@@ -234,7 +234,7 @@ func (cmd *ensureCommand) runDefault(ctx *dep.Ctx, args []string, p *dep.Project
 		return errors.Wrap(err, "prepare solver")
 	}
 
-	if p.Lock != nil && bytes.Equal(p.Lock.InputHash(), solver.HashInputs()) {
+	if p.Lock != nil && bytes.Equal(p.Lock.InputsDigest(), solver.HashInputs()) {
 		// Memo matches, so there's probably nothing to do.
 		if ctx.Verbose {
 			ctx.Out.Printf("%s was already in sync with imports and %s\n", dep.LockName, dep.ManifestName)
@@ -340,7 +340,7 @@ func (cmd *ensureCommand) runUpdate(ctx *dep.Ctx, args []string, p *dep.Project,
 	// user a bit, but the extra effort required is minimal, and it ensures the
 	// user is isolating variables in the event of solve problems (was it the
 	// "pending" changes, or the -update that caused the problem?).
-	if !bytes.Equal(p.Lock.InputHash(), solver.HashInputs()) {
+	if !bytes.Equal(p.Lock.InputsDigest(), solver.HashInputs()) {
 		ctx.Out.Printf("Warning: %s is out of sync with %s or the project's imports.", dep.LockName, dep.ManifestName)
 	}
 
@@ -405,7 +405,7 @@ func (cmd *ensureCommand) runAdd(ctx *dep.Ctx, args []string, p *dep.Project, sm
 	// user a bit, but the extra effort required is minimal, and it ensures the
 	// user is isolating variables in the event of solve problems (was it the
 	// "pending" changes, or the -add that caused the problem?).
-	if p.Lock != nil && !bytes.Equal(p.Lock.InputHash(), solver.HashInputs()) {
+	if p.Lock != nil && !bytes.Equal(p.Lock.InputsDigest(), solver.HashInputs()) {
 		ctx.Out.Printf("Warning: %s is out of sync with %s or the project's imports.", dep.LockName, dep.ManifestName)
 	}
 
diff --git a/internal/gps/lock.go b/internal/gps/lock.go
index 3952c808e1..8b776213df 100644
--- a/internal/gps/lock.go
+++ b/internal/gps/lock.go
@@ -18,8 +18,8 @@ import (
 // solution is all that would be necessary to constitute a lock file, though
 // tools can include whatever other information they want in their storage.
 type Lock interface {
-	// The hash of inputs to gps that resulted in this lock data
-	InputHash() []byte
+	// The hash digest of inputs to gps that resulted in this lock data.
+	InputsDigest() []byte
 
 	// Projects returns the list of LockedProjects contained in the lock data.
 	Projects() []LockedProject
@@ -30,7 +30,7 @@ type Lock interface {
 // parameter is true) whether the locks' input hashes are equal.
 func LocksAreEq(l1, l2 Lock, checkHash bool) bool {
 	// Cheapest ops first
-	if checkHash && !bytes.Equal(l1.InputHash(), l2.InputHash()) {
+	if checkHash && !bytes.Equal(l1.InputsDigest(), l2.InputsDigest()) {
 		return false
 	}
 
@@ -82,10 +82,10 @@ type SimpleLock []LockedProject
 
 var _ Lock = SimpleLock{}
 
-// InputHash always returns an empty string for SimpleLock. This makes it useless
+// InputsDigest always returns an empty string for SimpleLock. This makes it useless
 // as a stable lock to be written to disk, but still useful for some ephemeral
 // purposes.
-func (SimpleLock) InputHash() []byte {
+func (SimpleLock) InputsDigest() []byte {
 	return nil
 }
 
@@ -209,7 +209,7 @@ type safeLock struct {
 	p []LockedProject
 }
 
-func (sl safeLock) InputHash() []byte {
+func (sl safeLock) InputsDigest() []byte {
 	return sl.h
 }
 
@@ -226,7 +226,7 @@ func prepLock(l Lock) safeLock {
 	pl := l.Projects()
 
 	rl := safeLock{
-		h: l.InputHash(),
+		h: l.InputsDigest(),
 		p: make([]LockedProject, len(pl)),
 	}
 	copy(rl.p, pl)
diff --git a/internal/gps/lockdiff.go b/internal/gps/lockdiff.go
index b695486dea..839b49c5e5 100644
--- a/internal/gps/lockdiff.go
+++ b/internal/gps/lockdiff.go
@@ -79,8 +79,8 @@ func DiffLocks(l1 Lock, l2 Lock) *LockDiff {
 
 	diff := LockDiff{}
 
-	h1 := hex.EncodeToString(l1.InputHash())
-	h2 := hex.EncodeToString(l2.InputHash())
+	h1 := hex.EncodeToString(l1.InputsDigest())
+	h2 := hex.EncodeToString(l2.InputsDigest())
 	if h1 != h2 {
 		diff.HashDiff = &StringDiff{Previous: h1, Current: h2}
 	}
diff --git a/internal/gps/result.go b/internal/gps/solution.go
similarity index 98%
rename from internal/gps/result.go
rename to internal/gps/solution.go
index 4179f0d687..2422caabe6 100644
--- a/internal/gps/result.go
+++ b/internal/gps/solution.go
@@ -144,7 +144,7 @@ func (r solution) Attempts() int {
 	return r.att
 }
 
-func (r solution) InputHash() []byte {
+func (r solution) InputsDigest() []byte {
 	return r.hd
 }
 
diff --git a/internal/gps/result_test.go b/internal/gps/solution_test.go
similarity index 100%
rename from internal/gps/result_test.go
rename to internal/gps/solution_test.go
diff --git a/internal/gps/solve_basic_test.go b/internal/gps/solve_basic_test.go
index 066dc35b34..1936487718 100644
--- a/internal/gps/solve_basic_test.go
+++ b/internal/gps/solve_basic_test.go
@@ -1574,7 +1574,7 @@ func (ds depspec) DependencyConstraints() ProjectConstraints {
 type fixLock []LockedProject
 
 // impl Lock interface
-func (fixLock) InputHash() []byte {
+func (fixLock) InputsDigest() []byte {
 	return []byte("fooooorooooofooorooofoo")
 }
 
@@ -1586,7 +1586,7 @@ func (l fixLock) Projects() []LockedProject {
 type dummyLock struct{}
 
 // impl Lock interface
-func (dummyLock) InputHash() []byte {
+func (dummyLock) InputsDigest() []byte {
 	return []byte("fooooorooooofooorooofoo")
 }
 
diff --git a/internal/gps/source_cache_bolt_encode.go b/internal/gps/source_cache_bolt_encode.go
index 7d685aa988..c00513afed 100644
--- a/internal/gps/source_cache_bolt_encode.go
+++ b/internal/gps/source_cache_bolt_encode.go
@@ -278,7 +278,7 @@ func lockedProjectFromCache(m *pb.LockedProject) (LockedProject, error) {
 // cachePutLock stores the Lock as fields in the bolt.Bucket.
 func cachePutLock(b *bolt.Bucket, l Lock) error {
 	// InputHash
-	if v := l.InputHash(); len(v) > 0 {
+	if v := l.InputsDigest(); len(v) > 0 {
 		if err := b.Put(cacheKeyHash, v); err != nil {
 			return errors.Wrap(err, "failed to put hash")
 		}
diff --git a/lock.go b/lock.go
index f9c9b88253..e11e9839a4 100644
--- a/lock.go
+++ b/lock.go
@@ -112,8 +112,8 @@ func fromRawLock(raw rawLock) (*Lock, error) {
 	return l, nil
 }
 
-// InputHash returns the hash of inputs which produced this lock data.
-func (l *Lock) InputHash() []byte {
+// InputsDigest returns the hash of inputs which produced this lock data.
+func (l *Lock) InputsDigest() []byte {
 	return l.SolveMeta.InputsDigest
 }
 
@@ -182,7 +182,7 @@ func (l *Lock) MarshalTOML() ([]byte, error) {
 // Data is defensively copied wherever necessary to ensure the resulting *lock
 // shares no memory with the original lock.
 func LockFromSolution(in gps.Solution) *Lock {
-	h, p := in.InputHash(), in.Projects()
+	h, p := in.InputsDigest(), in.Projects()
 
 	l := &Lock{
 		SolveMeta: SolveMeta{