diff --git a/bin/exec-env b/bin/exec-env
new file mode 100755
index 0000000..012fc6f
--- /dev/null
+++ b/bin/exec-env
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+# Set Composer's home directory if it's not set.
+if [ "$ASDF_INSTALL_VERSION" != "system" ]; then
+  if [ -z "$COMPOSER_HOME" ]; then
+    export COMPOSER_HOME=$ASDF_INSTALL_PATH/.composer
+  fi
+fi
diff --git a/bin/install b/bin/install
index 9ba8988..acd7478 100755
--- a/bin/install
+++ b/bin/install
@@ -1,20 +1,4 @@
 #!/usr/bin/env bash
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
 
 set -eo pipefail
 
diff --git a/bin/list-all b/bin/list-all
index 6ff489f..e2b42c7 100755
--- a/bin/list-all
+++ b/bin/list-all
@@ -1,20 +1,4 @@
 #!/usr/bin/env bash
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
 
 set -eo pipefail
 
diff --git a/bin/list-bin-paths b/bin/list-bin-paths
index 39d64ec..5d0b003 100755
--- a/bin/list-bin-paths
+++ b/bin/list-bin-paths
@@ -1,19 +1,4 @@
 #!/usr/bin/env bash
-# Licensed to the Apache Software Foundation (ASF) under one
-# or more contributor license agreements.  See the NOTICE file
-# distributed with this work for additional information
-# regarding copyright ownership.  The ASF licenses this file
-# to you under the Apache License, Version 2.0 (the
-# "License"); you may not use this file except in compliance
-# with the License.  You may obtain a copy of the License at
-#
-#   http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing,
-# software distributed under the License is distributed on an
-# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-# KIND, either express or implied.  See the License for the
-# specific language governing permissions and limitations
-# under the License.
 
-echo "bin sbin"
+# Register PHP's binaries, and Composer's home vendor binaries.
+echo "bin sbin .composer/vendor/bin"