diff --git a/solver/registryauth.go b/solver/registryauth.go
index 20a4608f..cf2684fa 100644
--- a/solver/registryauth.go
+++ b/solver/registryauth.go
@@ -2,7 +2,6 @@ package solver
 
 import (
 	"context"
-	"net/url"
 	"strings"
 	"sync"
 
@@ -41,9 +40,9 @@ func (a *RegistryAuthProvider) Register(server *grpc.Server) {
 }
 
 func (a *RegistryAuthProvider) Credentials(ctx context.Context, req *bkauth.CredentialsRequest) (*bkauth.CredentialsResponse, error) {
-	reqURL, err := parseAuthHost(req.Host)
-	if err != nil {
-		return nil, err
+	host := req.Host
+	if host == "registry-1.docker.io" {
+		host = "docker.io"
 	}
 
 	a.m.RLock()
@@ -55,7 +54,7 @@ func (a *RegistryAuthProvider) Credentials(ctx context.Context, req *bkauth.Cred
 			return nil, err
 		}
 
-		if u.Host == reqURL.Host {
+		if u == host {
 			return auth, nil
 		}
 	}
@@ -63,23 +62,16 @@ func (a *RegistryAuthProvider) Credentials(ctx context.Context, req *bkauth.Cred
 	return &bkauth.CredentialsResponse{}, nil
 }
 
-func parseAuthHost(host string) (*url.URL, error) {
+func parseAuthHost(host string) (string, error) {
 	host = strings.TrimPrefix(host, "http://")
 	host = strings.TrimPrefix(host, "https://")
 
-	// Retrieve only the registry
-	host = strings.SplitN(host, "/", 2)[0]
-
 	ref, err := reference.ParseNormalizedNamed(host)
-	if err != nil {
-		return nil, err
-	}
-	host = ref.String()
 
-	if !strings.HasPrefix(host, "http://") && !strings.HasPrefix(host, "https://") {
-		host = "https://" + host
+	if err != nil {
+		return "", err
 	}
-	return url.Parse(host)
+	return reference.Domain(ref), nil
 }
 
 func (a *RegistryAuthProvider) FetchToken(ctx context.Context, req *bkauth.FetchTokenRequest) (rr *bkauth.FetchTokenResponse, err error) {
diff --git a/stdlib/dagger/op/op.cue b/stdlib/dagger/op/op.cue
index 8fff9c31..123e48f4 100644
--- a/stdlib/dagger/op/op.cue
+++ b/stdlib/dagger/op/op.cue
@@ -59,7 +59,7 @@ package op
 
 #DockerLogin: {
 	do:       "docker-login"
-	target:   string | *"https://index.docker.io/v1/"
+	target:   string
 	username: string
 	// FIXME: should be a #Secret (circular import)
 	secret: string | bytes
diff --git a/tests/ops/push-container/main.cue b/tests/ops/push-container/main.cue
index 7761c0a7..2b84729b 100644
--- a/tests/ops/push-container/main.cue
+++ b/tests/ops/push-container/main.cue
@@ -21,6 +21,7 @@ TestPushContainer: {
 		ref: "daggerio/ci-test:\(tag.out)"
 		#up: [
 			op.#DockerLogin & {
+				target: ref
 				registry
 			},
 			op.#WriteFile & {