diff --git a/provider.go b/provider.go
index 10ca6d7..92abdff 100644
--- a/provider.go
+++ b/provider.go
@@ -3,7 +3,13 @@ package step
 import "html/template"
 
 // Provider is an object which provides extra functionality to an environment.
-type Provider any
+type Provider interface {
+	// Package returns the package identifier of the provider. For example:
+	// git.tebibyte.media/sashakoshka/step/examples/testplugin. The only
+	// exception is providers within the providers sub-package, which just
+	// return their basename.
+	Package () string
+}
 
 // Configurable is an object that can be configured according to metadata.
 type Configurable interface {
diff --git a/providers/http/http.go b/providers/http/http.go
index 641ea05..687b96a 100644
--- a/providers/http/http.go
+++ b/providers/http/http.go
@@ -12,6 +12,11 @@ type Provider struct {
 	
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "http"
+}
+
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return template.FuncMap {
diff --git a/providers/import/import.go b/providers/import/import.go
index 3f0cecd..36335e3 100644
--- a/providers/import/import.go
+++ b/providers/import/import.go
@@ -13,9 +13,9 @@ type Provider struct {
 	
 }
 
-// FuncMap fulfills the step.FuncProvider interface.
-func (this *Provider) FuncMap () template.FuncMap {
-	return nil
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "import"
 }
 
 // FuncMapFor fulfills the step.FuncProviderFor interface.
diff --git a/providers/markdown/markdown.go b/providers/markdown/markdown.go
index b0a9b8a..8b44e48 100644
--- a/providers/markdown/markdown.go
+++ b/providers/markdown/markdown.go
@@ -20,6 +20,11 @@ type Provider struct {
 	RendererOptions []renderer.Option
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "markdown"
+}
+
 // Default returns a provider with the default configuration.
 func Default () *Provider {
 	return &Provider {
diff --git a/providers/math/math.go b/providers/math/math.go
index cc1997d..a6b2112 100644
--- a/providers/math/math.go
+++ b/providers/math/math.go
@@ -11,6 +11,11 @@ type Provider struct {
 	
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "math"
+}
+
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return template.FuncMap {
diff --git a/providers/mime/mime.go b/providers/mime/mime.go
index ffdf80c..d78f63d 100644
--- a/providers/mime/mime.go
+++ b/providers/mime/mime.go
@@ -6,16 +6,16 @@ import "git.tebibyte.media/sashakoshka/step"
 
 const hiddenPrefix = "."
 
-var _ step.FuncProvider = new(Provider)
+var _ step.FuncProviderFor = new(Provider)
 
 // Provider provides MIME functions.
 type Provider struct {
 	
 }
 
-// FuncMap fulfills the step.FuncProvider interface.
-func (this *Provider) FuncMap () template.FuncMap {
-	return nil
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "mime"
 }
 
 // FuncMapFor fulfills the step.FuncProviderFor interface.
diff --git a/providers/os/os.go b/providers/os/os.go
index 8c0be22..2beeead 100644
--- a/providers/os/os.go
+++ b/providers/os/os.go
@@ -13,9 +13,9 @@ type Provider struct {
 	
 }
 
-// FuncMap fulfills the step.FuncProvider interface.
-func (this *Provider) FuncMap () template.FuncMap {
-	return nil
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "os"
 }
 
 // FuncMapFor fulfills the step.FuncProviderFor interface.
diff --git a/providers/path/path.go b/providers/path/path.go
index 299eb2f..84aa0ee 100644
--- a/providers/path/path.go
+++ b/providers/path/path.go
@@ -15,6 +15,11 @@ type Provider struct {
 	
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "path"
+}
+
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return template.FuncMap {
diff --git a/providers/slice/slice.go b/providers/slice/slice.go
index 2f90a58..23256ac 100644
--- a/providers/slice/slice.go
+++ b/providers/slice/slice.go
@@ -13,6 +13,11 @@ type Provider struct {
 	
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "slice"
+}
+
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return template.FuncMap {
diff --git a/providers/sprig/sprig.go b/providers/sprig/sprig.go
index 13c51dd..e31d757 100644
--- a/providers/sprig/sprig.go
+++ b/providers/sprig/sprig.go
@@ -11,6 +11,11 @@ type Provider struct {
 	
 }
 
+// Package fulfills the step.Provider interface.
+func (this *Provider) Package () string {
+	return "sprig"
+}
+
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return sprig.FuncMap()