diff --git a/tests/pkg/assets/git-pkg/gold/install.gold b/tests/pkg/assets/git-pkg/gold/install.gold
index eba602a56..a730fde6f 100644
--- a/tests/pkg/assets/git-pkg/gold/install.gold
+++ b/tests/pkg/assets/git-pkg/gold/install.gold
@@ -3,6 +3,7 @@ OK
 ==================
 OK
 [pkg, install, pkg1]
+Package 'pkg1@1.0.0' installed with prefix 'pkg1'.
 ==================
 == package.lock
 prefixes:
diff --git a/tests/pkg/assets/git-pkg2/gold/00-install.gold b/tests/pkg/assets/git-pkg2/gold/00-install.gold
index eba602a56..a730fde6f 100644
--- a/tests/pkg/assets/git-pkg2/gold/00-install.gold
+++ b/tests/pkg/assets/git-pkg2/gold/00-install.gold
@@ -3,6 +3,7 @@ OK
 ==================
 OK
 [pkg, install, pkg1]
+Package 'pkg1@1.0.0' installed with prefix 'pkg1'.
 ==================
 == package.lock
 prefixes:
diff --git a/tests/pkg/assets/git-pkg2/gold/10-git package search.gold b/tests/pkg/assets/git-pkg2/gold/10-git package search.gold
index 0ee58c743..458dc168f 100644
--- a/tests/pkg/assets/git-pkg2/gold/10-git package search.gold	
+++ b/tests/pkg/assets/git-pkg2/gold/10-git package search.gold	
@@ -25,9 +25,11 @@ OK
 ==================
 OK
 [pkg, install, foo]
+Package 'foo@1.2.3' installed with prefix 'foo'.
 ==================
 OK
 [pkg, install, bar]
+Package 'bar@2.0.1' installed with prefix 'bar'.
 ==================
 // Execution should succeed now
 ==================
@@ -58,9 +60,11 @@ Exit Code: 1
 ==================
 OK
 [pkg, install, --prefix=pre1, foo]
+Package 'foo@1.2.3' installed with prefix 'foo'.
 ==================
 OK
 [pkg, install, --prefix=pre2, bar]
+Package 'bar@2.0.1' installed with prefix 'bar'.
 ==================
 // Execution should succeed now
 ==================
diff --git a/tests/pkg/assets/install-in-package/gold/00-test.gold b/tests/pkg/assets/install-in-package/gold/00-test.gold
new file mode 100644
index 000000000..9ccc0b318
--- /dev/null
+++ b/tests/pkg/assets/install-in-package/gold/00-test.gold
@@ -0,0 +1,44 @@
+OK
+[pkg, init]
+==================
+OK
+[pkg, registry, add, --local, test-reg, registry]
+==================
+OK
+[pkg, install, foo]
+Package 'foo@1.2.3' installed with prefix 'foo'.
+==================
+OK
+[pkg, install, bar]
+Package 'bar@2.0.1' installed with prefix 'bar'.
+==================
+== package.lock
+sdk: ^0.1.30
+prefixes:
+  bar: http_//localhost_<[*PORT*]>/pkg/bar-2
+  foo: http_//localhost_<[*PORT*]>/pkg/foo-1
+packages:
+  http_//localhost_<[*PORT*]>/pkg/bar-2:
+    prefixes:
+      foo: http_//localhost_<[*PORT*]>/pkg/foo-1
+      sub: http_//localhost_<[*PORT*]>/pkg/sub-3
+    url: http://localhost:<[*PORT*]>/pkg/bar
+    version: 2.0.1
+    hash: <[*HASH*]>
+  http_//localhost_<[*PORT*]>/pkg/foo-1:
+    url: http://localhost:<[*PORT*]>/pkg/foo
+    version: 1.2.3
+    hash: <[*HASH*]>
+  http_//localhost_<[*PORT*]>/pkg/sub-3:
+    url: http://localhost:<[*PORT*]>/pkg/sub
+    version: 3.1.4
+    hash: <[*HASH*]>
+==================
+== package.yaml
+dependencies:
+  foo:
+    url: http://localhost:<[*PORT*]>/pkg/foo
+    version: ^1.2.3
+  bar:
+    url: http://localhost:<[*PORT*]>/pkg/bar
+    version: ^2.0.1
diff --git a/tests/pkg/assets/install1/gold/install-existing-prefix.gold b/tests/pkg/assets/install1/gold/install-existing-prefix.gold
index e0b17158f..2b76610d9 100644
--- a/tests/pkg/assets/install1/gold/install-existing-prefix.gold
+++ b/tests/pkg/assets/install1/gold/install-existing-prefix.gold
@@ -1,2 +1,3 @@
 OK
 [pkg, install, --local, --prefix=pkg1, pkg2]
+Package 'pkg2' installed with prefix 'pkg1'.
diff --git a/tests/pkg/assets/install1/gold/install.gold b/tests/pkg/assets/install1/gold/install.gold
index a82a8ac8b..11c615ed0 100644
--- a/tests/pkg/assets/install1/gold/install.gold
+++ b/tests/pkg/assets/install1/gold/install.gold
@@ -12,6 +12,7 @@ Exit Code: 1
 ==================
 OK
 [pkg, install, --local, pkg]
+Package 'pkg' installed with prefix 'pkg'.
 ==================
 exec main.toit
 hello from pkg
@@ -21,6 +22,7 @@ Exit Code: 0
 ==================
 OK
 [pkg, install, --local, --prefix=prepkg, pkg2]
+Package 'pkg2' installed with prefix 'prepkg'.
 ==================
 exec main2.toit
 hello from pkg2
@@ -30,11 +32,13 @@ Exit Code: 0
 ==================
 OK
 [pkg, install, --local, pkg]
+Package 'pkg' installed with prefix 'pkg'.
 ==================
 // Installing a package where the directory name is not the package name.
 ==================
 OK
 [pkg, install, --local, pkg3]
+Package 'pkg3' installed with prefix 'pkg3_modified'.
 ==================
 exec main3.toit
 hello from pkg3_modified
diff --git a/tests/pkg/gold-tester.toit b/tests/pkg/gold-tester.toit
index 846cda48a..b03de6b83 100644
--- a/tests/pkg/gold-tester.toit
+++ b/tests/pkg/gold-tester.toit
@@ -128,6 +128,9 @@ class GoldTester:
       else if command == "package.lock":
         lock-content := file.read-contents "$working-dir_/package.lock"
         outputs.add "== package.lock\n$lock-content.to-string"
+      else if command == "package.yaml":
+        yaml-content := file.read-contents "$working-dir_/package.yaml"
+        outputs.add "== package.yaml\n$yaml-content.to-string"
       else if command == "pkg":
         test-ui := TestUi --quiet=false
         cli := Cli "pkg" --ui=test-ui
diff --git a/tests/pkg/install-in-package-gold-test.toit b/tests/pkg/install-in-package-gold-test.toit
new file mode 100644
index 000000000..f488bf8e3
--- /dev/null
+++ b/tests/pkg/install-in-package-gold-test.toit
@@ -0,0 +1,18 @@
+// Copyright (C) 2025 Toit contributors.
+// Use of this source code is governed by a Zero-Clause BSD license that can
+// be found in the tests/LICENSE file.
+
+import .gold-tester
+
+main args:
+  with-gold-tester --with-git-pkg-registry args: test it
+
+test tester/GoldTester:
+  tester.gold "00-test" [
+    ["pkg", "init"],  // So we don't accidentally use a /tmp/package.yaml.
+    ["pkg", "registry", "add", "--local", "test-reg", "registry"],
+    ["pkg", "install", "foo"],
+    ["pkg", "install", "bar"],
+    ["package.lock"],
+    ["package.yaml"]
+  ]
diff --git a/tools/pkg/commands/install.toit b/tools/pkg/commands/install.toit
index ece732d1c..1029cd42d 100644
--- a/tools/pkg/commands/install.toit
+++ b/tools/pkg/commands/install.toit
@@ -71,9 +71,12 @@ class InstallCommand extends PkgProjectCommand:
     if not prefix: prefix = remote-package.name
 
     if project.specification.has-package prefix:
-      error "Project already has a package with name '$prefix'."
+      error "Project already has a package with prefix '$prefix'."
 
     project.install-remote prefix remote-package --registries=registries
+    id := "$remote-package.name@$remote-package.version"
+    name := remote-package.name
+    ui.emit --info "Package '$id' installed with prefix '$name'."
 
   execute-local:
     specification-name := "$package/$Specification.FILE-NAME"
@@ -88,6 +91,7 @@ class InstallCommand extends PkgProjectCommand:
     if not prefix: prefix = specification.name
 
     project.install-local prefix package --registries=registries
+    ui.emit --info "Package '$package' installed with prefix '$prefix'."
 
   static CLI-COMMAND ::=
       cli.Command "install"