diff --git a/client/llb/exec.go b/client/llb/exec.go
index ade992780eef0..743c82db7af3a 100644
--- a/client/llb/exec.go
+++ b/client/llb/exec.go
@@ -17,6 +17,7 @@ type Meta struct {
 	Env        EnvList
 	Cwd        string
 	User       string
+	Hostname   string
 	ProxyEnv   *ProxyEnv
 	ExtraHosts []HostIP
 	Network    pb.NetMode
@@ -155,10 +156,11 @@ func (e *ExecOp) Marshal(c *Constraints) (digest.Digest, []byte, *pb.OpMetadata,
 	}
 
 	meta := &pb.Meta{
-		Args: e.meta.Args,
-		Env:  e.meta.Env.ToArray(),
-		Cwd:  e.meta.Cwd,
-		User: e.meta.User,
+		Args:     e.meta.Args,
+		Env:      e.meta.Env.ToArray(),
+		Cwd:      e.meta.Cwd,
+		User:     e.meta.User,
+		Hostname: e.meta.Hostname,
 	}
 	if len(e.meta.ExtraHosts) > 0 {
 		hosts := make([]*pb.HostIP, len(e.meta.ExtraHosts))
diff --git a/client/llb/meta.go b/client/llb/meta.go
index 54b14c4c4257d..7a1ed5e3cca2d 100644
--- a/client/llb/meta.go
+++ b/client/llb/meta.go
@@ -18,6 +18,7 @@ var (
 	keyDir       = contextKeyT("llb.exec.dir")
 	keyEnv       = contextKeyT("llb.exec.env")
 	keyUser      = contextKeyT("llb.exec.user")
+	keyHostname  = contextKeyT("llb.exec.hostname")
 	keyExtraHost = contextKeyT("llb.exec.extrahost")
 	keyPlatform  = contextKeyT("llb.platform")
 	keyNetwork   = contextKeyT("llb.network")
@@ -99,6 +100,20 @@ func getUser(s State) string {
 	return ""
 }
 
+func hostname(str string) StateOption {
+	return func(s State) State {
+		return s.WithValue(keyHostname, str)
+	}
+}
+
+func getHostname(s State) string {
+	v := s.Value(keyHostname)
+	if v != nil {
+		return v.(string)
+	}
+	return ""
+}
+
 func args(args ...string) StateOption {
 	return func(s State) State {
 		return s.WithValue(keyArgs, args)
diff --git a/client/llb/state.go b/client/llb/state.go
index ba8845e08692a..20762fb971668 100644
--- a/client/llb/state.go
+++ b/client/llb/state.go
@@ -211,6 +211,7 @@ func (s State) Run(ro ...RunOption) ExecState {
 		Cwd:        getDir(ei.State),
 		Env:        getEnv(ei.State),
 		User:       getUser(ei.State),
+		Hostname:   getHostname(ei.State),
 		ProxyEnv:   ei.ProxyEnv,
 		ExtraHosts: getExtraHosts(ei.State),
 		Network:    getNetwork(ei.State),
@@ -278,6 +279,14 @@ func (s State) User(v string) State {
 	return user(v)(s)
 }
 
+func (s State) Hostname(v string) State {
+	return hostname(v)(s)
+}
+
+func (s State) GetHostname() string {
+	return getHostname(s)
+}
+
 func (s State) Platform(p specs.Platform) State {
 	return platform(p)(s)
 }
diff --git a/executor/containerdexecutor/executor.go b/executor/containerdexecutor/executor.go
index 2ca4a5850f093..b0baac5640e22 100644
--- a/executor/containerdexecutor/executor.go
+++ b/executor/containerdexecutor/executor.go
@@ -56,7 +56,7 @@ func (w containerdExecutor) Exec(ctx context.Context, meta executor.Meta, root c
 		return err
 	}
 
-	hostsFile, clean, err := oci.GetHostsFile(ctx, w.root, meta.ExtraHosts, nil)
+	hostsFile, clean, err := oci.GetHostsFile(ctx, w.root, meta.ExtraHosts, nil, meta.Hostname)
 	if err != nil {
 		return err
 	}
diff --git a/executor/executor.go b/executor/executor.go
index df6d7920e54ff..bdb5bc6e18e9f 100644
--- a/executor/executor.go
+++ b/executor/executor.go
@@ -14,6 +14,7 @@ type Meta struct {
 	Env            []string
 	User           string
 	Cwd            string
+	Hostname       string
 	Tty            bool
 	ReadonlyRootFS bool
 	ExtraHosts     []HostIP
diff --git a/executor/oci/hosts.go b/executor/oci/hosts.go
index 3b3f86db79cbe..d90385b6030f5 100644
--- a/executor/oci/hosts.go
+++ b/executor/oci/hosts.go
@@ -7,6 +7,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"strings"
 
 	"github.com/docker/docker/pkg/idtools"
 	"github.com/moby/buildkit/executor"
@@ -18,10 +19,10 @@ const hostsContent = `
 ::1	localhost ip6-localhost ip6-loopback
 `
 
-func GetHostsFile(ctx context.Context, stateDir string, extraHosts []executor.HostIP, idmap *idtools.IdentityMapping) (string, func(), error) {
+func GetHostsFile(ctx context.Context, stateDir string, extraHosts []executor.HostIP, idmap *idtools.IdentityMapping, hostname string) (string, func(), error) {
 	if len(extraHosts) == 0 {
 		_, err := g.Do(ctx, stateDir, func(ctx context.Context) (interface{}, error) {
-			_, _, err := makeHostsFile(stateDir, nil, idmap)
+			_, _, err := makeHostsFile(stateDir, nil, idmap, hostname)
 			return nil, err
 		})
 		if err != nil {
@@ -29,10 +30,10 @@ func GetHostsFile(ctx context.Context, stateDir string, extraHosts []executor.Ho
 		}
 		return filepath.Join(stateDir, "hosts"), func() {}, nil
 	}
-	return makeHostsFile(stateDir, extraHosts, idmap)
+	return makeHostsFile(stateDir, extraHosts, idmap, hostname)
 }
 
-func makeHostsFile(stateDir string, extraHosts []executor.HostIP, idmap *idtools.IdentityMapping) (string, func(), error) {
+func makeHostsFile(stateDir string, extraHosts []executor.HostIP, idmap *idtools.IdentityMapping, hostname string) (string, func(), error) {
 	p := filepath.Join(stateDir, "hosts")
 	if len(extraHosts) != 0 {
 		p += "." + identity.NewID()
@@ -47,7 +48,11 @@ func makeHostsFile(stateDir string, extraHosts []executor.HostIP, idmap *idtools
 
 	b := &bytes.Buffer{}
 
-	if _, err := b.Write([]byte(hostsContent)); err != nil {
+	var hosts = hostsContent
+	if hostname != "" {
+		hosts = strings.Replace(hosts, "buildkitsandbox", hostname, 1)
+	}
+	if _, err := b.Write([]byte(hosts)); err != nil {
 		return "", nil, err
 	}
 
diff --git a/executor/oci/spec_unix.go b/executor/oci/spec_unix.go
index 5fe8d09e37346..4d0d8522c87fe 100644
--- a/executor/oci/spec_unix.go
+++ b/executor/oci/spec_unix.go
@@ -65,7 +65,11 @@ func GenerateSpec(ctx context.Context, meta executor.Meta, mounts []executor.Mou
 	s.Process.Cwd = meta.Cwd
 	s.Process.Rlimits = nil           // reset open files limit
 	s.Process.NoNewPrivileges = false // reset nonewprivileges
+
 	s.Hostname = "buildkitsandbox"
+	if meta.Hostname != "" {
+		s.Hostname = meta.Hostname
+	}
 
 	s.Mounts, err = GetMounts(ctx,
 		withProcessMode(processMode),
diff --git a/executor/runcexecutor/executor.go b/executor/runcexecutor/executor.go
index 26e432e61f6bd..4c8bccd7aa7ed 100644
--- a/executor/runcexecutor/executor.go
+++ b/executor/runcexecutor/executor.go
@@ -142,7 +142,7 @@ func (w *runcExecutor) Exec(ctx context.Context, meta executor.Meta, root cache.
 		return err
 	}
 
-	hostsFile, clean, err := oci.GetHostsFile(ctx, w.root, meta.ExtraHosts, w.idmap)
+	hostsFile, clean, err := oci.GetHostsFile(ctx, w.root, meta.ExtraHosts, w.idmap, meta.Hostname)
 	if err != nil {
 		return err
 	}
diff --git a/frontend/dockerfile/dockerfile2llb/convert.go b/frontend/dockerfile/dockerfile2llb/convert.go
index 2077eb8a5150f..e76074ab2fff4 100644
--- a/frontend/dockerfile/dockerfile2llb/convert.go
+++ b/frontend/dockerfile/dockerfile2llb/convert.go
@@ -315,6 +315,9 @@ func Dockerfile2LLB(ctx context.Context, dt []byte, opt ConvertOpt) (*llb.State,
 			k, v := parseKeyValue(env)
 			d.state = d.state.AddEnv(k, v)
 		}
+		if val, ok := opt.BuildArgs["HOSTNAME"]; ok {
+			d.state = d.state.Hostname(val)
+		}
 		if d.image.Config.WorkingDir != "" {
 			if err = dispatchWorkdir(d, &instructions.WorkdirCommand{Path: d.image.Config.WorkingDir}, false, nil); err != nil {
 				return nil, nil, err
diff --git a/solver/llbsolver/ops/exec.go b/solver/llbsolver/ops/exec.go
index 324b442d6bc5e..39f1992acc984 100644
--- a/solver/llbsolver/ops/exec.go
+++ b/solver/llbsolver/ops/exec.go
@@ -693,6 +693,7 @@ func (e *execOp) Exec(ctx context.Context, inputs []solver.Result) ([]solver.Res
 		Env:            e.op.Meta.Env,
 		Cwd:            e.op.Meta.Cwd,
 		User:           e.op.Meta.User,
+		Hostname:       e.op.Meta.Hostname,
 		ReadonlyRootFS: readonlyRootFS,
 		ExtraHosts:     extraHosts,
 		NetMode:        e.op.Network,
diff --git a/solver/pb/ops.pb.go b/solver/pb/ops.pb.go
index dbb0f21f3b1de..5d9243947d7b8 100644
--- a/solver/pb/ops.pb.go
+++ b/solver/pb/ops.pb.go
@@ -54,7 +54,7 @@ func (x NetMode) String() string {
 	return proto.EnumName(NetMode_name, int32(x))
 }
 func (NetMode) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{0}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{0}
 }
 
 type SecurityMode int32
@@ -77,7 +77,7 @@ func (x SecurityMode) String() string {
 	return proto.EnumName(SecurityMode_name, int32(x))
 }
 func (SecurityMode) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{1}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{1}
 }
 
 // MountType defines a type of a mount from a supported set
@@ -110,7 +110,7 @@ func (x MountType) String() string {
 	return proto.EnumName(MountType_name, int32(x))
 }
 func (MountType) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{2}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{2}
 }
 
 // CacheSharingOpt defines different sharing modes for cache mount
@@ -140,7 +140,7 @@ func (x CacheSharingOpt) String() string {
 	return proto.EnumName(CacheSharingOpt_name, int32(x))
 }
 func (CacheSharingOpt) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{3}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{3}
 }
 
 // Op represents a vertex of the LLB DAG.
@@ -161,7 +161,7 @@ func (m *Op) Reset()         { *m = Op{} }
 func (m *Op) String() string { return proto.CompactTextString(m) }
 func (*Op) ProtoMessage()    {}
 func (*Op) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{0}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{0}
 }
 func (m *Op) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -391,7 +391,7 @@ func (m *Platform) Reset()         { *m = Platform{} }
 func (m *Platform) String() string { return proto.CompactTextString(m) }
 func (*Platform) ProtoMessage()    {}
 func (*Platform) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{1}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{1}
 }
 func (m *Platform) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -463,7 +463,7 @@ func (m *Input) Reset()         { *m = Input{} }
 func (m *Input) String() string { return proto.CompactTextString(m) }
 func (*Input) ProtoMessage()    {}
 func (*Input) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{2}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{2}
 }
 func (m *Input) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -500,7 +500,7 @@ func (m *ExecOp) Reset()         { *m = ExecOp{} }
 func (m *ExecOp) String() string { return proto.CompactTextString(m) }
 func (*ExecOp) ProtoMessage()    {}
 func (*ExecOp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{3}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{3}
 }
 func (m *ExecOp) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -563,13 +563,14 @@ type Meta struct {
 	User       string    `protobuf:"bytes,4,opt,name=user,proto3" json:"user,omitempty"`
 	ProxyEnv   *ProxyEnv `protobuf:"bytes,5,opt,name=proxy_env,json=proxyEnv,proto3" json:"proxy_env,omitempty"`
 	ExtraHosts []*HostIP `protobuf:"bytes,6,rep,name=extraHosts,proto3" json:"extraHosts,omitempty"`
+	Hostname   string    `protobuf:"bytes,7,opt,name=hostname,proto3" json:"hostname,omitempty"`
 }
 
 func (m *Meta) Reset()         { *m = Meta{} }
 func (m *Meta) String() string { return proto.CompactTextString(m) }
 func (*Meta) ProtoMessage()    {}
 func (*Meta) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{4}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{4}
 }
 func (m *Meta) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -636,6 +637,13 @@ func (m *Meta) GetExtraHosts() []*HostIP {
 	return nil
 }
 
+func (m *Meta) GetHostname() string {
+	if m != nil {
+		return m.Hostname
+	}
+	return ""
+}
+
 // Mount specifies how to mount an input Op as a filesystem.
 type Mount struct {
 	Input     InputIndex  `protobuf:"varint,1,opt,name=input,proto3,customtype=InputIndex" json:"input"`
@@ -653,7 +661,7 @@ func (m *Mount) Reset()         { *m = Mount{} }
 func (m *Mount) String() string { return proto.CompactTextString(m) }
 func (*Mount) ProtoMessage()    {}
 func (*Mount) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{5}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{5}
 }
 func (m *Mount) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -739,7 +747,7 @@ func (m *CacheOpt) Reset()         { *m = CacheOpt{} }
 func (m *CacheOpt) String() string { return proto.CompactTextString(m) }
 func (*CacheOpt) ProtoMessage()    {}
 func (*CacheOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{6}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{6}
 }
 func (m *CacheOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -797,7 +805,7 @@ func (m *SecretOpt) Reset()         { *m = SecretOpt{} }
 func (m *SecretOpt) String() string { return proto.CompactTextString(m) }
 func (*SecretOpt) ProtoMessage()    {}
 func (*SecretOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{7}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{7}
 }
 func (m *SecretOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -876,7 +884,7 @@ func (m *SSHOpt) Reset()         { *m = SSHOpt{} }
 func (m *SSHOpt) String() string { return proto.CompactTextString(m) }
 func (*SSHOpt) ProtoMessage()    {}
 func (*SSHOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{8}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{8}
 }
 func (m *SSHOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -949,7 +957,7 @@ func (m *SourceOp) Reset()         { *m = SourceOp{} }
 func (m *SourceOp) String() string { return proto.CompactTextString(m) }
 func (*SourceOp) ProtoMessage()    {}
 func (*SourceOp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{9}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{9}
 }
 func (m *SourceOp) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1001,7 +1009,7 @@ func (m *BuildOp) Reset()         { *m = BuildOp{} }
 func (m *BuildOp) String() string { return proto.CompactTextString(m) }
 func (*BuildOp) ProtoMessage()    {}
 func (*BuildOp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{10}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{10}
 }
 func (m *BuildOp) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1056,7 +1064,7 @@ func (m *BuildInput) Reset()         { *m = BuildInput{} }
 func (m *BuildInput) String() string { return proto.CompactTextString(m) }
 func (*BuildInput) ProtoMessage()    {}
 func (*BuildInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{11}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{11}
 }
 func (m *BuildInput) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1097,7 +1105,7 @@ func (m *OpMetadata) Reset()         { *m = OpMetadata{} }
 func (m *OpMetadata) String() string { return proto.CompactTextString(m) }
 func (*OpMetadata) ProtoMessage()    {}
 func (*OpMetadata) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{12}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{12}
 }
 func (m *OpMetadata) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1158,7 +1166,7 @@ func (m *ExportCache) Reset()         { *m = ExportCache{} }
 func (m *ExportCache) String() string { return proto.CompactTextString(m) }
 func (*ExportCache) ProtoMessage()    {}
 func (*ExportCache) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{13}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{13}
 }
 func (m *ExportCache) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1201,7 +1209,7 @@ func (m *ProxyEnv) Reset()         { *m = ProxyEnv{} }
 func (m *ProxyEnv) String() string { return proto.CompactTextString(m) }
 func (*ProxyEnv) ProtoMessage()    {}
 func (*ProxyEnv) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{14}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{14}
 }
 func (m *ProxyEnv) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1263,7 +1271,7 @@ func (m *WorkerConstraints) Reset()         { *m = WorkerConstraints{} }
 func (m *WorkerConstraints) String() string { return proto.CompactTextString(m) }
 func (*WorkerConstraints) ProtoMessage()    {}
 func (*WorkerConstraints) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{15}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{15}
 }
 func (m *WorkerConstraints) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1308,7 +1316,7 @@ func (m *Definition) Reset()         { *m = Definition{} }
 func (m *Definition) String() string { return proto.CompactTextString(m) }
 func (*Definition) ProtoMessage()    {}
 func (*Definition) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{16}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{16}
 }
 func (m *Definition) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1356,7 +1364,7 @@ func (m *HostIP) Reset()         { *m = HostIP{} }
 func (m *HostIP) String() string { return proto.CompactTextString(m) }
 func (*HostIP) ProtoMessage()    {}
 func (*HostIP) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{17}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{17}
 }
 func (m *HostIP) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1403,7 +1411,7 @@ func (m *FileOp) Reset()         { *m = FileOp{} }
 func (m *FileOp) String() string { return proto.CompactTextString(m) }
 func (*FileOp) ProtoMessage()    {}
 func (*FileOp) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{18}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{18}
 }
 func (m *FileOp) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1451,7 +1459,7 @@ func (m *FileAction) Reset()         { *m = FileAction{} }
 func (m *FileAction) String() string { return proto.CompactTextString(m) }
 func (*FileAction) ProtoMessage()    {}
 func (*FileAction) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{19}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{19}
 }
 func (m *FileAction) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1676,7 +1684,7 @@ func (m *FileActionCopy) Reset()         { *m = FileActionCopy{} }
 func (m *FileActionCopy) String() string { return proto.CompactTextString(m) }
 func (*FileActionCopy) ProtoMessage()    {}
 func (*FileActionCopy) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{20}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{20}
 }
 func (m *FileActionCopy) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1795,7 +1803,7 @@ func (m *FileActionMkFile) Reset()         { *m = FileActionMkFile{} }
 func (m *FileActionMkFile) String() string { return proto.CompactTextString(m) }
 func (*FileActionMkFile) ProtoMessage()    {}
 func (*FileActionMkFile) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{21}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{21}
 }
 func (m *FileActionMkFile) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1872,7 +1880,7 @@ func (m *FileActionMkDir) Reset()         { *m = FileActionMkDir{} }
 func (m *FileActionMkDir) String() string { return proto.CompactTextString(m) }
 func (*FileActionMkDir) ProtoMessage()    {}
 func (*FileActionMkDir) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{22}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{22}
 }
 func (m *FileActionMkDir) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1945,7 +1953,7 @@ func (m *FileActionRm) Reset()         { *m = FileActionRm{} }
 func (m *FileActionRm) String() string { return proto.CompactTextString(m) }
 func (*FileActionRm) ProtoMessage()    {}
 func (*FileActionRm) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{23}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{23}
 }
 func (m *FileActionRm) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2000,7 +2008,7 @@ func (m *ChownOpt) Reset()         { *m = ChownOpt{} }
 func (m *ChownOpt) String() string { return proto.CompactTextString(m) }
 func (*ChownOpt) ProtoMessage()    {}
 func (*ChownOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{24}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{24}
 }
 func (m *ChownOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2050,7 +2058,7 @@ func (m *UserOpt) Reset()         { *m = UserOpt{} }
 func (m *UserOpt) String() string { return proto.CompactTextString(m) }
 func (*UserOpt) ProtoMessage()    {}
 func (*UserOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{25}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{25}
 }
 func (m *UserOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2190,7 +2198,7 @@ func (m *NamedUserOpt) Reset()         { *m = NamedUserOpt{} }
 func (m *NamedUserOpt) String() string { return proto.CompactTextString(m) }
 func (*NamedUserOpt) ProtoMessage()    {}
 func (*NamedUserOpt) Descriptor() ([]byte, []int) {
-	return fileDescriptor_ops_0b9d2e829935306b, []int{26}
+	return fileDescriptor_ops_0b387df4eb2619c7, []int{26}
 }
 func (m *NamedUserOpt) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2589,6 +2597,12 @@ func (m *Meta) MarshalTo(dAtA []byte) (int, error) {
 			i += n
 		}
 	}
+	if len(m.Hostname) > 0 {
+		dAtA[i] = 0x3a
+		i++
+		i = encodeVarintOps(dAtA, i, uint64(len(m.Hostname)))
+		i += copy(dAtA[i:], m.Hostname)
+	}
 	return i, nil
 }
 
@@ -3931,6 +3945,10 @@ func (m *Meta) Size() (n int) {
 			n += 1 + l + sovOps(uint64(l))
 		}
 	}
+	l = len(m.Hostname)
+	if l > 0 {
+		n += 1 + l + sovOps(uint64(l))
+	}
 	return n
 }
 
@@ -5445,6 +5463,35 @@ func (m *Meta) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 7:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Hostname", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowOps
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthOps
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Hostname = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipOps(dAtA[iNdEx:])
@@ -9230,132 +9277,133 @@ var (
 	ErrIntOverflowOps   = fmt.Errorf("proto: integer overflow")
 )
 
-func init() { proto.RegisterFile("ops.proto", fileDescriptor_ops_0b9d2e829935306b) }
-
-var fileDescriptor_ops_0b9d2e829935306b = []byte{
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+func init() { proto.RegisterFile("ops.proto", fileDescriptor_ops_0b387df4eb2619c7) }
+
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-	0xe1, 0xf0, 0xac, 0x69, 0xe3, 0xae, 0x9d, 0xd3, 0xce, 0x59, 0xaf, 0x59, 0x42, 0xf2, 0xe1, 0x83,
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-	0xff, 0xff, 0x87, 0x95, 0x80, 0x20, 0x7a, 0x12, 0x00, 0x00,
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+	0xb1, 0xc4, 0x81, 0xca, 0xa3, 0xc1, 0xa8, 0xf7, 0xb0, 0xb9, 0x41, 0xea, 0x50, 0x3e, 0x1b, 0x8e,
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+	0x3a, 0x6b, 0xda, 0xb8, 0x6b, 0xe7, 0xb4, 0x73, 0xd6, 0x6b, 0x96, 0x90, 0x7c, 0xf8, 0xe0, 0xfc,
+	0xfe, 0xa8, 0x59, 0x3e, 0xfc, 0x04, 0x6e, 0x5c, 0x79, 0xcf, 0xa8, 0xd5, 0x67, 0xa7, 0xb4, 0x87,
+	0x9a, 0x1a, 0x50, 0x3b, 0xa7, 0xfd, 0xc7, 0xa7, 0x0f, 0x7b, 0x4d, 0x0b, 0x05, 0x5f, 0x0d, 0x3b,
+	0x5f, 0xf6, 0xba, 0x4d, 0xbb, 0x7d, 0xeb, 0xdb, 0x17, 0xbb, 0xd6, 0x77, 0x2f, 0x76, 0xad, 0xef,
+	0x5f, 0xec, 0x5a, 0xff, 0x7e, 0xb1, 0x6b, 0x7d, 0xf3, 0x72, 0x77, 0xe3, 0xbb, 0x97, 0xbb, 0x1b,
+	0xdf, 0xbf, 0xdc, 0xdd, 0x18, 0x57, 0xd5, 0xdf, 0x4a, 0x1f, 0xff, 0x27, 0x00, 0x00, 0xff, 0xff,
+	0xb9, 0xf3, 0xd6, 0x61, 0x96, 0x12, 0x00, 0x00,
 }
diff --git a/solver/pb/ops.proto b/solver/pb/ops.proto
index a24aad12c4c8f..1e0cc7165a838 100644
--- a/solver/pb/ops.proto
+++ b/solver/pb/ops.proto
@@ -57,6 +57,7 @@ message Meta {
 	string user = 4;
 	ProxyEnv proxy_env = 5;
 	repeated HostIP extraHosts = 6;
+	string hostname = 7;
 }
 
 enum NetMode {