diff --git a/.travis.yml b/.travis.yml
index 011789e1..87f786e1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,4 +3,5 @@ language: go
 go:
   - 1.9.x
   - 1.10.x
+  - 1.11.x
   - master
diff --git a/client.go b/client.go
index cfcff9db..0e959807 100644
--- a/client.go
+++ b/client.go
@@ -128,6 +128,7 @@ func cmdAutoComplete(c *rpc.Client) {
 	// For now, assume same environment for server and client.
 	req.Context = &suggest.PackedContext{}
 	req.Builtin = *g_builtin
+	req.IgnoreCase = *g_ignore_case
 
 	var res AutoCompleteReply
 	var err error
diff --git a/gocode.go b/gocode.go
index 87fbf3cd..7cdae64b 100644
--- a/gocode.go
+++ b/gocode.go
@@ -8,14 +8,15 @@ import (
 )
 
 var (
-	g_is_server = flag.Bool("s", false, "run a server instead of a client")
-	g_format    = flag.String("f", "nice", "output format (vim | emacs | nice | csv | json)")
-	g_input     = flag.String("in", "", "use this file instead of stdin input")
-	g_sock      = flag.String("sock", defaultSocketType, "socket type (unix | tcp | none)")
-	g_addr      = flag.String("addr", "127.0.0.1:37373", "address for tcp socket")
-	g_debug     = flag.Bool("debug", false, "enable server-side debug mode")
-	g_source    = flag.Bool("source", false, "use source importer")
-	g_builtin   = flag.Bool("builtin", false, "propose builtin objects")
+	g_is_server   = flag.Bool("s", false, "run a server instead of a client")
+	g_format      = flag.String("f", "nice", "output format (vim | emacs | nice | csv | json)")
+	g_input       = flag.String("in", "", "use this file instead of stdin input")
+	g_sock        = flag.String("sock", defaultSocketType, "socket type (unix | tcp | none)")
+	g_addr        = flag.String("addr", "127.0.0.1:37373", "address for tcp socket")
+	g_debug       = flag.Bool("debug", false, "enable server-side debug mode")
+	g_source      = flag.Bool("source", false, "use source importer")
+	g_builtin     = flag.Bool("builtin", false, "propose builtin objects")
+	g_ignore_case = flag.Bool("ignore-case", false, "do case-insensitive matching")
 )
 
 func getSocketPath() string {
diff --git a/internal/suggest/candidate.go b/internal/suggest/candidate.go
index d83bda90..7bfd64be 100644
--- a/internal/suggest/candidate.go
+++ b/internal/suggest/candidate.go
@@ -2,6 +2,7 @@ package suggest
 
 import (
 	"fmt"
+	"go/ast"
 	"go/types"
 	"sort"
 	"strings"
@@ -77,10 +78,12 @@ func classifyObject(obj types.Object) string {
 type candidateCollector struct {
 	exact      []types.Object
 	badcase    []types.Object
+	imports    []*ast.ImportSpec
 	localpkg   *types.Package
 	partial    string
 	filter     objectFilter
 	builtin    bool
+	ignoreCase bool
 }
 
 func (b *candidateCollector) getCandidates() []Candidate {
@@ -162,6 +165,26 @@ func (b *candidateCollector) qualify(pkg *types.Package) string {
 	if pkg == b.localpkg {
 		return ""
 	}
+
+	// the *types.Package we are asked to qualify might _not_ be imported
+	// by the file in which we are asking for candidates. Hence... we retain
+	// the default of pkg.Name() as the qualifier
+
+	for _, i := range b.imports {
+		// given the import spec has been correctly parsed (by virtue of
+		// its existence) we can safely byte-index the path value knowing
+		// that len("\"") == 1
+		iPath := i.Path.Value[1 : len(i.Path.Value)-1]
+
+		if iPath == pkg.Path() {
+			if i.Name != nil && i.Name.Name != "." {
+				return i.Name.Name
+			} else {
+				return pkg.Name()
+			}
+		}
+	}
+
 	return pkg.Name()
 }
 
@@ -180,8 +203,7 @@ func (b *candidateCollector) appendObject(obj types.Object) {
 	if b.filter != nil && !b.filter(obj) {
 		return
 	}
-
-	if b.filter != nil || strings.HasPrefix(obj.Name(), b.partial) {
+	if !b.ignoreCase && (b.filter != nil || strings.HasPrefix(obj.Name(), b.partial)) {
 		b.exact = append(b.exact, obj)
 	} else if strings.HasPrefix(strings.ToLower(obj.Name()), strings.ToLower(b.partial)) {
 		b.badcase = append(b.badcase, obj)
diff --git a/internal/suggest/suggest.go b/internal/suggest/suggest.go
index b3f8bf6e..38b0ceb2 100644
--- a/internal/suggest/suggest.go
+++ b/internal/suggest/suggest.go
@@ -8,6 +8,7 @@ import (
 	"go/token"
 	"go/types"
 	"os"
+	"strings"
 	"sync"
 
 	"github.com/stamblerre/gocode/internal/lookdot"
@@ -15,9 +16,10 @@ import (
 )
 
 type Config struct {
-	Logf    func(fmt string, args ...interface{})
-	Context *PackedContext
-	Builtin bool
+	Logf       func(fmt string, args ...interface{})
+	Context    *PackedContext
+	Builtin    bool
+	IgnoreCase bool
 }
 
 // Copied from go/packages.
@@ -49,7 +51,7 @@ func (c *Config) Suggest(filename string, data []byte, cursor int) ([]Candidate,
 		return nil, 0
 	}
 
-	fset, pos, pkg := c.analyzePackage(filename, data, cursor)
+	fset, pos, pkg, imports := c.analyzePackage(filename, data, cursor)
 	if pkg == nil {
 		return nil, 0
 	}
@@ -57,10 +59,12 @@ func (c *Config) Suggest(filename string, data []byte, cursor int) ([]Candidate,
 
 	ctx, expr, partial := deduceCursorContext(data, cursor)
 	b := candidateCollector{
-		localpkg: pkg,
-		partial:  partial,
-		filter:   objectFilters[partial],
-		builtin:  ctx != selectContext && c.Builtin,
+		localpkg:   pkg,
+		imports:    imports,
+		partial:    partial,
+		filter:     objectFilters[partial],
+		builtin:    ctx != selectContext && c.Builtin,
+		ignoreCase: c.IgnoreCase,
 	}
 
 	switch ctx {
@@ -99,19 +103,20 @@ func (c *Config) Suggest(filename string, data []byte, cursor int) ([]Candidate,
 	return res, len(partial)
 }
 
-func sameFile(filename1, filename2 string) bool {
-	finfo1, err := os.Stat(filename1)
-	if err != nil {
-		return false
+func (c *Config) analyzePackage(filename string, data []byte, cursor int) (*token.FileSet, token.Pos, *types.Package, []*ast.ImportSpec) {
+	var tags string
+	parsed, _ := parser.ParseFile(token.NewFileSet(), filename, data, parser.ParseComments)
+	if parsed != nil && len(parsed.Comments) > 0 {
+		buildTagText := parsed.Comments[0].Text()
+		if strings.HasPrefix(buildTagText, "+build ") {
+			tags = strings.TrimPrefix(buildTagText, "+build ")
+		}
 	}
-	finfo2, err := os.Stat(filename2)
-	if err != nil {
-		return false
+	if suffix := buildConstraint(filename); suffix != "" {
+		tags = suffix
 	}
-	return os.SameFile(finfo1, finfo2)
-}
 
-func (c *Config) analyzePackage(filename string, data []byte, cursor int) (*token.FileSet, token.Pos, *types.Package) {
+	var fileAST *ast.File
 	var pos token.Pos
 	var posMu sync.Mutex // guards pos in ParseFile
 
@@ -119,9 +124,9 @@ func (c *Config) analyzePackage(filename string, data []byte, cursor int) (*toke
 		Mode:       packages.LoadSyntax,
 		Env:        c.Context.Env,
 		Dir:        c.Context.Dir,
-		BuildFlags: c.Context.BuildFlags,
+		BuildFlags: append(c.Context.BuildFlags, fmt.Sprintf("-tags=%s", tags)),
 		Tests:      true,
-		ParseFile: func(fset *token.FileSet, parseFilename string) (*ast.File, error) {
+		ParseFile: func(fset *token.FileSet, parseFilename string, _ []byte) (*ast.File, error) {
 			var src interface{}
 			var filePos token.Pos
 			mode := parser.DeclarationErrors
@@ -137,6 +142,7 @@ func (c *Config) analyzePackage(filename string, data []byte, cursor int) (*toke
 				return nil, err
 			}
 			if sameFile(filename, parseFilename) {
+				fileAST = file
 				filePos = fset.File(file.Pos()).Pos(cursor)
 				if filePos == token.NoPos {
 					return nil, fmt.Errorf("no position for cursor in %s", parseFilename)
@@ -159,11 +165,23 @@ func (c *Config) analyzePackage(filename string, data []byte, cursor int) (*toke
 	}
 	pkgs, _ := packages.Load(cfg, fmt.Sprintf("contains:%v", filename))
 	if len(pkgs) <= 0 { // ignore errors
-		return nil, token.NoPos, nil
+		return nil, token.NoPos, nil, nil
 	}
 	pkg := pkgs[0]
 
-	return pkg.Fset, pos, pkg.Types
+	return pkg.Fset, pos, pkg.Types, fileAST.Imports
+}
+
+func sameFile(filename1, filename2 string) bool {
+	finfo1, err := os.Stat(filename1)
+	if err != nil {
+		return false
+	}
+	finfo2, err := os.Stat(filename2)
+	if err != nil {
+		return false
+	}
+	return os.SameFile(finfo1, finfo2)
 }
 
 func (c *Config) fieldNameCandidates(typ types.Type, b *candidateCollector) {
diff --git a/internal/suggest/suggest_test.go b/internal/suggest/suggest_test.go
index 938c5c96..5ca0c2e1 100644
--- a/internal/suggest/suggest_test.go
+++ b/internal/suggest/suggest_test.go
@@ -6,6 +6,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 
@@ -19,6 +20,11 @@ func TestRegress(t *testing.T) {
 	}
 
 	for _, testDir := range testDirs {
+		// Skip test.0011 for Go <= 1.11 because a method was added to reflect.Value.
+		// TODO(rstambler): Change this when Go 1.12 comes out.
+		if !strings.HasPrefix(runtime.Version(), "devel") && strings.HasSuffix(testDir, "test.0011") {
+				continue
+		}
 		testDir := testDir // capture
 		name := strings.TrimPrefix(testDir, "testdata/")
 		t.Run(name, func(t *testing.T) {
@@ -81,3 +87,12 @@ func testRegress(t *testing.T, testDir string) {
 		return
 	}
 }
+
+func contains(haystack []string, needle string) bool {
+	for _, x := range haystack {
+		if needle == x {
+			return true
+		}
+	}
+	return false
+}
\ No newline at end of file
diff --git a/internal/suggest/testdata/test.0065/out.expected b/internal/suggest/testdata/test.0065/out.expected
index 33630698..040ba3c3 100644
--- a/internal/suggest/testdata/test.0065/out.expected
+++ b/internal/suggest/testdata/test.0065/out.expected
@@ -1,2 +1,26 @@
-Found 1 candidates:
-  func New(text string) error
+Found 25 candidates:
+  func Errorf(format string, a ...interface{}) error
+  func Fprint(w banana.Writer, a ...interface{}) (n int, err error)
+  func Fprintf(w banana.Writer, format string, a ...interface{}) (n int, err error)
+  func Fprintln(w banana.Writer, a ...interface{}) (n int, err error)
+  func Fscan(r banana.Reader, a ...interface{}) (n int, err error)
+  func Fscanf(r banana.Reader, format string, a ...interface{}) (n int, err error)
+  func Fscanln(r banana.Reader, a ...interface{}) (n int, err error)
+  func Print(a ...interface{}) (n int, err error)
+  func Printf(format string, a ...interface{}) (n int, err error)
+  func Println(a ...interface{}) (n int, err error)
+  func Scan(a ...interface{}) (n int, err error)
+  func Scanf(format string, a ...interface{}) (n int, err error)
+  func Scanln(a ...interface{}) (n int, err error)
+  func Sprint(a ...interface{}) string
+  func Sprintf(format string, a ...interface{}) string
+  func Sprintln(a ...interface{}) string
+  func Sscan(str string, a ...interface{}) (n int, err error)
+  func Sscanf(str string, format string, a ...interface{}) (n int, err error)
+  func Sscanln(str string, a ...interface{}) (n int, err error)
+  type Formatter interface
+  type GoStringer interface
+  type ScanState interface
+  type Scanner interface
+  type State interface
+  type Stringer interface
diff --git a/internal/suggest/testdata/test.0065/test.go.in b/internal/suggest/testdata/test.0065/test.go.in
index 74646e9c..2120ae51 100644
--- a/internal/suggest/testdata/test.0065/test.go.in
+++ b/internal/suggest/testdata/test.0065/test.go.in
@@ -1,7 +1,8 @@
 package p
 
-import "errors"
+import (
+	"fmt"
+	banana "io"
+)
 
-func f() {
-	errors.@
-}
+var _ = fmt.@
diff --git a/internal/suggest/testdata/test.0066/config.json b/internal/suggest/testdata/test.0066/config.json
new file mode 100644
index 00000000..e30fee59
--- /dev/null
+++ b/internal/suggest/testdata/test.0066/config.json
@@ -0,0 +1 @@
+{"IgnoreCase": false}
diff --git a/internal/suggest/testdata/test.0066/out.expected b/internal/suggest/testdata/test.0066/out.expected
new file mode 100644
index 00000000..4dbcfa95
--- /dev/null
+++ b/internal/suggest/testdata/test.0066/out.expected
@@ -0,0 +1,2 @@
+Found 1 candidates:
+  func FuncX()
diff --git a/internal/suggest/testdata/test.0066/test.go.in b/internal/suggest/testdata/test.0066/test.go.in
new file mode 100644
index 00000000..d4f2f733
--- /dev/null
+++ b/internal/suggest/testdata/test.0066/test.go.in
@@ -0,0 +1,8 @@
+package p
+
+func FuncX() {}
+func funcY() {}
+
+func f() {
+	Fun@
+}
diff --git a/internal/suggest/testdata/test.0067/config.json b/internal/suggest/testdata/test.0067/config.json
new file mode 100644
index 00000000..e30fee59
--- /dev/null
+++ b/internal/suggest/testdata/test.0067/config.json
@@ -0,0 +1 @@
+{"IgnoreCase": false}
diff --git a/internal/suggest/testdata/test.0067/out.expected b/internal/suggest/testdata/test.0067/out.expected
new file mode 100644
index 00000000..eb986f88
--- /dev/null
+++ b/internal/suggest/testdata/test.0067/out.expected
@@ -0,0 +1,2 @@
+Found 1 candidates:
+  func funcY()
diff --git a/internal/suggest/testdata/test.0067/test.go.in b/internal/suggest/testdata/test.0067/test.go.in
new file mode 100644
index 00000000..0efabfee
--- /dev/null
+++ b/internal/suggest/testdata/test.0067/test.go.in
@@ -0,0 +1,8 @@
+package p
+
+func FuncX() {}
+func funcY() {}
+
+func f() {
+	fun@
+}
diff --git a/internal/suggest/testdata/test.0068/config.json b/internal/suggest/testdata/test.0068/config.json
new file mode 100644
index 00000000..30d49ee2
--- /dev/null
+++ b/internal/suggest/testdata/test.0068/config.json
@@ -0,0 +1 @@
+{"IgnoreCase": true}
diff --git a/internal/suggest/testdata/test.0068/out.expected b/internal/suggest/testdata/test.0068/out.expected
new file mode 100644
index 00000000..1b60778a
--- /dev/null
+++ b/internal/suggest/testdata/test.0068/out.expected
@@ -0,0 +1,3 @@
+Found 2 candidates:
+  func FuncX()
+  func funcY()
diff --git a/internal/suggest/testdata/test.0068/test.go.in b/internal/suggest/testdata/test.0068/test.go.in
new file mode 100644
index 00000000..0efabfee
--- /dev/null
+++ b/internal/suggest/testdata/test.0068/test.go.in
@@ -0,0 +1,8 @@
+package p
+
+func FuncX() {}
+func funcY() {}
+
+func f() {
+	fun@
+}
diff --git a/server.go b/server.go
index 51f6b941..d1f2f86e 100644
--- a/server.go
+++ b/server.go
@@ -49,11 +49,13 @@ type Server struct {
 }
 
 type AutoCompleteRequest struct {
-	Context  *suggest.PackedContext
-	Filename string
-	Data     []byte
-	Cursor   int
-	Builtin  bool
+	Filename   string
+	Data       []byte
+	Cursor     int
+	Context    gbimporter.PackedContext
+	Source     bool
+	Builtin    bool
+	IgnoreCase bool
 }
 
 type AutoCompleteReply struct {
@@ -85,8 +87,9 @@ func (s *Server) AutoComplete(req *AutoCompleteRequest, res *AutoCompleteReply)
 	}
 	now := time.Now()
 	cfg := suggest.Config{
-		Builtin: req.Builtin,
-		Context: req.Context,
+		Importer:   gbimporter.New(&req.Context, req.Filename, underlying),
+		Builtin:    req.Builtin,
+		IgnoreCase: req.IgnoreCase,
 	}
 	if *g_debug {
 		cfg.Logf = log.Printf