diff --git a/go.mod b/go.mod
index cdd2aee..4a9cac4 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,12 @@ module github.com/gtramontina/ooze
 
 go 1.20
 
+retract (
+	// This version contains an issue that prevents Ooze from running on
+	// internal packages. See https://github.com/gtramontina/ooze/issues/9.
+	v0.3.0
+)
+
 require (
 	github.com/fatih/color v1.15.0
 	github.com/hexops/gotextdiff v1.0.3
diff --git a/internal/gosourcefile/gosourcefile.go b/internal/gosourcefile/gosourcefile.go
index 33aef18..54b8156 100644
--- a/internal/gosourcefile/gosourcefile.go
+++ b/internal/gosourcefile/gosourcefile.go
@@ -3,10 +3,8 @@ package gosourcefile
 import (
 	"fmt"
 	"go/ast"
-	"go/importer"
 	"go/parser"
 	"go/token"
-	"go/types"
 
 	"github.com/gtramontina/ooze/internal/goinfectedfile"
 	"github.com/gtramontina/ooze/viruses"
@@ -32,24 +30,10 @@ func (f *GoSourceFile) Incubate(virus viruses.Virus) []*goinfectedfile.GoInfecte
 		panic(fmt.Errorf("failed parsing file '%s': %w", f.relativePath, err))
 	}
 
-	cfg := types.Config{ //nolint:exhaustruct // default values for missing fields are okay
-		Importer: importer.Default(),
-	}
-
-	info := types.Info{ //nolint:exhaustruct // Info.TypeOf needs Defs, Uses, and Types populated, we don't need the rest
-		Defs:  map[*ast.Ident]types.Object{},
-		Uses:  map[*ast.Ident]types.Object{},
-		Types: map[ast.Expr]types.TypeAndValue{},
-	}
-
-	if _, err := cfg.Check(f.relativePath, fileSet, []*ast.File{fileTree}, &info); err != nil {
-		panic(fmt.Errorf("failed type checking for file '%s': %w", f.relativePath, err))
-	}
-
 	var infectedFiles []*goinfectedfile.GoInfectedFile
 
 	ast.Inspect(fileTree, func(node ast.Node) bool {
-		for _, infection := range virus.Incubate(node, &info) {
+		for _, infection := range virus.Incubate(node, nil) {
 			infectedFiles = append(infectedFiles, goinfectedfile.New(f.relativePath, f.rawContent, infection, fileSet, fileTree))
 		}
 
diff --git a/release.go b/release.go
index 01936a7..f90669b 100644
--- a/release.go
+++ b/release.go
@@ -28,7 +28,6 @@ import (
 	"github.com/gtramontina/ooze/viruses/arithmeticassignment"
 	"github.com/gtramontina/ooze/viruses/arithmeticassignmentinvert"
 	"github.com/gtramontina/ooze/viruses/bitwise"
-	"github.com/gtramontina/ooze/viruses/cancelnil"
 	"github.com/gtramontina/ooze/viruses/comparison"
 	"github.com/gtramontina/ooze/viruses/comparisoninvert"
 	"github.com/gtramontina/ooze/viruses/comparisonreplace"
@@ -59,7 +58,6 @@ var defaultOptions = Options{ //nolint:gochecknoglobals
 		arithmeticassignment.New(),
 		arithmeticassignmentinvert.New(),
 		bitwise.New(),
-		cancelnil.New(),
 		comparison.New(),
 		comparisoninvert.New(),
 		comparisonreplace.New(),
diff --git a/viruses/cancelnil/cancelnil_test.go b/viruses/cancelnil/cancelnil_test.go
index d0f6972..92e2587 100644
--- a/viruses/cancelnil/cancelnil_test.go
+++ b/viruses/cancelnil/cancelnil_test.go
@@ -8,6 +8,7 @@ import (
 )
 
 func TestCancelNil(t *testing.T) {
+	t.Skip("temporarily: https://github.com/gtramontina/ooze/pull/10")
 	oozetesting.Run(t, oozetesting.NewScenarios(
 		"Call cancel(nil)",
 		cancelnil.New(),