diff --git a/codegen/data.go b/codegen/data.go
index 71206885be1..ed93bcbb15a 100644
--- a/codegen/data.go
+++ b/codegen/data.go
@@ -5,8 +5,10 @@ import (
 	"sort"
 
 	"github.com/99designs/gqlgen/codegen/config"
+	"github.com/99designs/gqlgen/internal/code"
 	"github.com/pkg/errors"
 	"github.com/vektah/gqlparser/ast"
+	"golang.org/x/tools/go/packages"
 )
 
 // Data is a unified model of the code to be generated. Plugins may modify this structure to do things like implement
@@ -25,6 +27,9 @@ type Data struct {
 	QueryRoot        *Object
 	MutationRoot     *Object
 	SubscriptionRoot *Object
+
+	// This is important for looking up packages during code generation
+	NameForPackage code.NameForPackage
 }
 
 type builder struct {
@@ -75,12 +80,18 @@ func BuildData(cfg *config.Config) (*Data, error) {
 		}
 	}
 
+	pkgs, err := packages.Load(&packages.Config{Mode: packages.NeedName}, cfg.Models.ReferencedPackages()...)
+	if err != nil {
+		return nil, errors.Wrap(err, "loading failed")
+	}
+
 	s := Data{
-		Config:     cfg,
-		Directives: dataDirectives,
-		Schema:     b.Schema,
-		SchemaStr:  b.SchemaStr,
-		Interfaces: map[string]*Interface{},
+		Config:         cfg,
+		Directives:     dataDirectives,
+		Schema:         b.Schema,
+		SchemaStr:      b.SchemaStr,
+		Interfaces:     map[string]*Interface{},
+		NameForPackage: code.NewNameForPackage(pkgs),
 	}
 
 	for _, schemaType := range b.Schema.Types {
diff --git a/codegen/generate.go b/codegen/generate.go
index eafa3f87434..820b5d56db8 100644
--- a/codegen/generate.go
+++ b/codegen/generate.go
@@ -11,5 +11,6 @@ func GenerateCode(data *Data) error {
 		Data:            data,
 		RegionTags:      true,
 		GeneratedHeader: true,
+		NameForPackage:  data.NameForPackage,
 	})
 }
diff --git a/codegen/templates/import.go b/codegen/templates/import.go
index d5bd16a6a1e..5ec7304b335 100644
--- a/codegen/templates/import.go
+++ b/codegen/templates/import.go
@@ -10,14 +10,16 @@ import (
 )
 
 type Import struct {
-	Name  string
-	Path  string
-	Alias string
+	NameForPackage code.NameForPackage
+	Name           string
+	Path           string
+	Alias          string
 }
 
 type Imports struct {
-	imports []*Import
-	destDir string
+	nameForPackage code.NameForPackage
+	imports        []*Import
+	destDir        string
 }
 
 func (i *Import) String() string {
@@ -49,7 +51,7 @@ func (s *Imports) Reserve(path string, aliases ...string) (string, error) {
 		return "", nil
 	}
 
-	name := code.NameForPackage(path)
+	name := s.nameForPackage.Get(path)
 	var alias string
 	if len(aliases) != 1 {
 		alias = name
@@ -69,9 +71,10 @@ func (s *Imports) Reserve(path string, aliases ...string) (string, error) {
 	}
 
 	s.imports = append(s.imports, &Import{
-		Name:  name,
-		Path:  path,
-		Alias: alias,
+		NameForPackage: s.nameForPackage,
+		Name:           name,
+		Path:           path,
+		Alias:          alias,
 	})
 
 	return "", nil
@@ -94,8 +97,9 @@ func (s *Imports) Lookup(path string) string {
 	}
 
 	imp := &Import{
-		Name: code.NameForPackage(path),
-		Path: path,
+		NameForPackage: s.nameForPackage,
+		Name:           s.nameForPackage.Get(path),
+		Path:           path,
 	}
 	s.imports = append(s.imports, imp)
 
diff --git a/codegen/templates/import_test.go b/codegen/templates/import_test.go
index d225457576f..f0f01ff6d44 100644
--- a/codegen/templates/import_test.go
+++ b/codegen/templates/import_test.go
@@ -5,7 +5,9 @@ import (
 	"os"
 	"testing"
 
+	"github.com/99designs/gqlgen/internal/code"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/tools/go/packages"
 )
 
 func TestImports(t *testing.T) {
@@ -16,15 +18,20 @@ func TestImports(t *testing.T) {
 	bBar := "github.com/99designs/gqlgen/codegen/templates/testdata/b/bar"
 	mismatch := "github.com/99designs/gqlgen/codegen/templates/testdata/pkg_mismatch"
 
+	ps, err := packages.Load(nil, aBar, bBar, mismatch)
+	require.NoError(t, err)
+
+	nameForPackage := code.NewNameForPackage(ps)
+
 	t.Run("multiple lookups is ok", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 
 		require.Equal(t, "bar", a.Lookup(aBar))
 		require.Equal(t, "bar", a.Lookup(aBar))
 	})
 
 	t.Run("lookup by type", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 
 		pkg := types.NewPackage("github.com/99designs/gqlgen/codegen/templates/testdata/b/bar", "bar")
 		typ := types.NewNamed(types.NewTypeName(0, pkg, "Boolean", types.Typ[types.Bool]), types.Typ[types.Bool], nil)
@@ -33,7 +40,7 @@ func TestImports(t *testing.T) {
 	})
 
 	t.Run("duplicates are decollisioned", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 
 		require.Equal(t, "bar", a.Lookup(aBar))
 		require.Equal(t, "bar1", a.Lookup(bBar))
@@ -44,13 +51,13 @@ func TestImports(t *testing.T) {
 	})
 
 	t.Run("package name defined in code will be used", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 
 		require.Equal(t, "turtles", a.Lookup(mismatch))
 	})
 
 	t.Run("string printing for import block", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 		a.Lookup(aBar)
 		a.Lookup(bBar)
 		a.Lookup(mismatch)
@@ -65,7 +72,7 @@ turtles "github.com/99designs/gqlgen/codegen/templates/testdata/pkg_mismatch"`,
 	})
 
 	t.Run("aliased imports will not collide", func(t *testing.T) {
-		a := Imports{destDir: wd}
+		a := Imports{nameForPackage: nameForPackage, destDir: wd}
 
 		_, _ = a.Reserve(aBar, "abar")
 		_, _ = a.Reserve(bBar, "bbar")
diff --git a/codegen/templates/templates.go b/codegen/templates/templates.go
index 5d5f69bf88d..fd7ec088576 100644
--- a/codegen/templates/templates.go
+++ b/codegen/templates/templates.go
@@ -15,6 +15,7 @@ import (
 	"text/template"
 	"unicode"
 
+	"github.com/99designs/gqlgen/internal/code"
 	"github.com/99designs/gqlgen/internal/imports"
 	"github.com/pkg/errors"
 )
@@ -43,6 +44,9 @@ type Options struct {
 	// Data will be passed to the template execution.
 	Data  interface{}
 	Funcs template.FuncMap
+
+	// Lookups for pre-cached package names
+	NameForPackage code.NameForPackage
 }
 
 // Render renders a gql plugin template from the given Options. Render is an
@@ -53,7 +57,7 @@ func Render(cfg Options) error {
 	if CurrentImports != nil {
 		panic(fmt.Errorf("recursive or concurrent call to RenderToFile detected"))
 	}
-	CurrentImports = &Imports{destDir: filepath.Dir(cfg.Filename)}
+	CurrentImports = &Imports{nameForPackage: cfg.NameForPackage, destDir: filepath.Dir(cfg.Filename)}
 
 	// load path relative to calling source file
 	_, callerFile, _, _ := runtime.Caller(1)
@@ -143,7 +147,7 @@ func Render(cfg Options) error {
 	}
 	CurrentImports = nil
 
-	return write(cfg.Filename, result.Bytes())
+	return write(cfg.Filename, result.Bytes(), cfg.NameForPackage)
 }
 
 func center(width int, pad string, s string) string {
@@ -551,13 +555,13 @@ func render(filename string, tpldata interface{}) (*bytes.Buffer, error) {
 	return buf, t.Execute(buf, tpldata)
 }
 
-func write(filename string, b []byte) error {
+func write(filename string, b []byte, nameForPackage code.NameForPackage) error {
 	err := os.MkdirAll(filepath.Dir(filename), 0755)
 	if err != nil {
 		return errors.Wrap(err, "failed to create directory")
 	}
 
-	formatted, err := imports.Prune(filename, b)
+	formatted, err := imports.Prune(filename, b, nameForPackage)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "gofmt failed on %s: %s\n", filepath.Base(filename), err.Error())
 		formatted = b
diff --git a/internal/code/imports.go b/internal/code/imports.go
index ad62f7c56b1..e9b18c6999d 100644
--- a/internal/code/imports.go
+++ b/internal/code/imports.go
@@ -14,8 +14,6 @@ import (
 	"golang.org/x/tools/go/packages"
 )
 
-var nameForPackageCache = sync.Map{}
-
 var gopaths []string
 
 func init() {
@@ -93,23 +91,41 @@ func ImportPathForDir(dir string) (res string) {
 var modregex = regexp.MustCompile("module (.*)\n")
 
 // NameForPackage returns the package name for a given import path. This can be really slow.
-func NameForPackage(importPath string) string {
+type NameForPackage struct {
+	cache    *sync.Map
+	packages []*packages.Package
+}
+
+// NewNameForPackage creates a NameForPackage
+func NewNameForPackage(packages []*packages.Package) NameForPackage {
+	return NameForPackage{
+		cache:    &sync.Map{},
+		packages: packages,
+	}
+}
+
+// Get returns the package name for a given import path. This can be really slow.
+func (n NameForPackage) Get(importPath string) string {
 	if importPath == "" {
 		panic(errors.New("import path can not be empty"))
 	}
-	if v, ok := nameForPackageCache.Load(importPath); ok {
+
+	if v, ok := n.cache.Load(importPath); ok {
 		return v.(string)
 	}
 	importPath = QualifyPackagePath(importPath)
-	p, _ := packages.Load(&packages.Config{
-		Mode: packages.NeedName,
-	}, importPath)
+	var p *packages.Package
+	for _, pkg := range n.packages {
+		if pkg.PkgPath == importPath {
+			p = pkg
+		}
+	}
 
-	if len(p) != 1 || p[0].Name == "" {
+	if p == nil || p.Name == "" {
 		return SanitizePackageName(filepath.Base(importPath))
 	}
 
-	nameForPackageCache.Store(importPath, p[0].Name)
+	n.cache.Store(importPath, p.Name)
 
-	return p[0].Name
+	return p.Name
 }
diff --git a/internal/code/imports_test.go b/internal/code/imports_test.go
index e3bc9474f99..f2aed0bbe7e 100644
--- a/internal/code/imports_test.go
+++ b/internal/code/imports_test.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
+	"golang.org/x/tools/go/packages"
 )
 
 func TestImportPathForDir(t *testing.T) {
@@ -31,11 +32,15 @@ func TestImportPathForDir(t *testing.T) {
 }
 
 func TestNameForPackage(t *testing.T) {
-	assert.Equal(t, "api", NameForPackage("github.com/99designs/gqlgen/api"))
+	ps, _ := packages.Load(&packages.Config{Mode: packages.NeedName},
+		"github.com/99designs/gqlgen/api", "github.com/99designs/gqlgen/docs", "github.com")
+	nfp := NewNameForPackage(ps)
+
+	assert.Equal(t, "api", nfp.Get("github.com/99designs/gqlgen/api"))
 
 	// does not contain go code, should still give a valid name
-	assert.Equal(t, "docs", NameForPackage("github.com/99designs/gqlgen/docs"))
-	assert.Equal(t, "github_com", NameForPackage("github.com"))
+	assert.Equal(t, "docs", nfp.Get("github.com/99designs/gqlgen/docs"))
+	assert.Equal(t, "github_com", nfp.Get("github.com"))
 }
 
 func TestNameForDir(t *testing.T) {
diff --git a/internal/imports/prune.go b/internal/imports/prune.go
index 27ac94ac0f0..62b1a4f2f50 100644
--- a/internal/imports/prune.go
+++ b/internal/imports/prune.go
@@ -24,7 +24,7 @@ func (fn visitFn) Visit(node ast.Node) ast.Visitor {
 }
 
 // Prune removes any unused imports
-func Prune(filename string, src []byte) ([]byte, error) {
+func Prune(filename string, src []byte, nameForPackage code.NameForPackage) ([]byte, error) {
 	fset := token.NewFileSet()
 
 	file, err := parser.ParseFile(fset, filename, src, parser.ParseComments|parser.AllErrors)
@@ -32,7 +32,7 @@ func Prune(filename string, src []byte) ([]byte, error) {
 		return nil, err
 	}
 
-	unused := getUnusedImports(file)
+	unused := getUnusedImports(file, nameForPackage)
 	for ipath, name := range unused {
 		astutil.DeleteNamedImport(fset, file, name, ipath)
 	}
@@ -46,7 +46,7 @@ func Prune(filename string, src []byte) ([]byte, error) {
 	return imports.Process(filename, buf.Bytes(), &imports.Options{FormatOnly: true, Comments: true, TabIndent: true, TabWidth: 8})
 }
 
-func getUnusedImports(file ast.Node) map[string]string {
+func getUnusedImports(file ast.Node, nameForPackage code.NameForPackage) map[string]string {
 	imported := map[string]*ast.ImportSpec{}
 	used := map[string]bool{}
 
@@ -65,7 +65,7 @@ func getUnusedImports(file ast.Node) map[string]string {
 				break
 			}
 
-			local := code.NameForPackage(ipath)
+			local := nameForPackage.Get(ipath)
 
 			imported[local] = v
 		case *ast.SelectorExpr:
diff --git a/internal/imports/prune_test.go b/internal/imports/prune_test.go
index d0691bf242e..533443ca1e7 100644
--- a/internal/imports/prune_test.go
+++ b/internal/imports/prune_test.go
@@ -4,11 +4,12 @@ import (
 	"io/ioutil"
 	"testing"
 
+	"github.com/99designs/gqlgen/internal/code"
 	"github.com/stretchr/testify/require"
 )
 
 func TestPrune(t *testing.T) {
-	b, err := Prune("testdata/unused.go", mustReadFile("testdata/unused.go"))
+	b, err := Prune("testdata/unused.go", mustReadFile("testdata/unused.go"), code.NewNameForPackage(nil))
 	require.NoError(t, err)
 	require.Equal(t, string(mustReadFile("testdata/unused.expected.go")), string(b))
 }
diff --git a/plugin/modelgen/models.go b/plugin/modelgen/models.go
index b7b224d7cbc..e83d69844bd 100644
--- a/plugin/modelgen/models.go
+++ b/plugin/modelgen/models.go
@@ -7,8 +7,11 @@ import (
 
 	"github.com/99designs/gqlgen/codegen/config"
 	"github.com/99designs/gqlgen/codegen/templates"
+	"github.com/99designs/gqlgen/internal/code"
 	"github.com/99designs/gqlgen/plugin"
+	"github.com/pkg/errors"
 	"github.com/vektah/gqlparser/ast"
+	"golang.org/x/tools/go/packages"
 )
 
 type BuildMutateHook = func(b *ModelBuild) *ModelBuild
@@ -235,11 +238,17 @@ func (m *Plugin) MutateConfig(cfg *config.Config) error {
 		b = m.MutateHook(b)
 	}
 
+	pkgs, err := packages.Load(&packages.Config{Mode: packages.NeedName}, cfg.Models.ReferencedPackages()...)
+	if err != nil {
+		return errors.Wrap(err, "loading failed")
+	}
+
 	return templates.Render(templates.Options{
 		PackageName:     cfg.Model.Package,
 		Filename:        cfg.Model.Filename,
 		Data:            b,
 		GeneratedHeader: true,
+		NameForPackage:  code.NewNameForPackage(pkgs),
 	})
 }
 
diff --git a/plugin/resolvergen/resolver.go b/plugin/resolvergen/resolver.go
index 6785c77c45f..d3b7d2af62b 100644
--- a/plugin/resolvergen/resolver.go
+++ b/plugin/resolvergen/resolver.go
@@ -36,9 +36,10 @@ func (m *Plugin) GenerateCode(data *codegen.Data) error {
 
 	if _, err := os.Stat(filename); os.IsNotExist(errors.Cause(err)) {
 		return templates.Render(templates.Options{
-			PackageName: data.Config.Resolver.Package,
-			Filename:    data.Config.Resolver.Filename,
-			Data:        resolverBuild,
+			PackageName:    data.Config.Resolver.Package,
+			Filename:       data.Config.Resolver.Filename,
+			Data:           resolverBuild,
+			NameForPackage: data.NameForPackage,
 		})
 	}
 
diff --git a/plugin/servergen/server.go b/plugin/servergen/server.go
index 22289c0254d..883c5aeeabc 100644
--- a/plugin/servergen/server.go
+++ b/plugin/servergen/server.go
@@ -31,9 +31,10 @@ func (m *Plugin) GenerateCode(data *codegen.Data) error {
 
 	if _, err := os.Stat(m.filename); os.IsNotExist(errors.Cause(err)) {
 		return templates.Render(templates.Options{
-			PackageName: "main",
-			Filename:    m.filename,
-			Data:        serverBuild,
+			PackageName:    "main",
+			Filename:       m.filename,
+			Data:           serverBuild,
+			NameForPackage: data.NameForPackage,
 		})
 	}
 
diff --git a/plugin/stubgen/stubs.go b/plugin/stubgen/stubs.go
index af5171b4cfa..9d4af8904e7 100644
--- a/plugin/stubgen/stubs.go
+++ b/plugin/stubgen/stubs.go
@@ -48,6 +48,7 @@ func (m *Plugin) GenerateCode(data *codegen.Data) error {
 			TypeName: m.typeName,
 		},
 		GeneratedHeader: true,
+		NameForPackage:  data.NameForPackage,
 	})
 }