diff --git a/runenv-java-stub.go b/dump-args.go
similarity index 83%
rename from runenv-java-stub.go
rename to dump-args.go
index c65ad76..c6b3618 100644
--- a/runenv-java-stub.go
+++ b/dump-args.go
@@ -11,7 +11,7 @@ func main() {
 	cmdName := os.Args[0]
 
 	if len(os.Args) == 1 {
-		fmt.Fprintf(os.Stdout, "%q of java run environment was started with no command and arguments", cmdName)
+		fmt.Fprintf(os.Stdout, "%q was started with no arguments", cmdName)
 	}
 
 	const columnWidth = 8
diff --git a/package-lock.json b/package-lock.json
index 0a01978..9425552 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
     "name": "@milaboratory/small-binaries",
-    "version": "1.8.1",
+    "version": "1.9.0",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "@milaboratory/small-binaries",
-            "version": "1.8.1",
+            "version": "1.9.0",
             "license": "UNLICENSED",
             "devDependencies": {
                 "@milaboratory/pl-package-builder": "^2.8.0"
diff --git a/package.json b/package.json
index 0230367..e4f43eb 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
     "name": "@milaboratory/small-binaries",
-    "version": "1.8.1",
+    "version": "1.9.0",
     "description": "Small cross-platform binaries, like 'sleep' or 'hello-world', suitable for test needs",
     "scripts": {
         "cleanup": "rm -rf ./pkg-*.tgz && rm -rf ./build/ && rm -rf ./dist/",
@@ -11,7 +11,8 @@
         "pkg:publish": "pl-pkg publish packages --all-platforms --skip-existing-packages",
         "pkg:release": "npm run pkg:build && npm run pkg:publish",
 
-        "descriptors:build": "pl-pkg build descriptors",
+        "descriptors:b:runenv": "pl-pkg build descriptors --entrypoint runenv-python-stub --entrypoint runenv-java-stub",
+        "descriptors:build": "npm run descriptors:b:runenv && pl-pkg build descriptors",
         "descriptors:publish": "pl-pkg publish descriptors",
         "descriptors:release": "npm run descriptors:build && npm run descriptors:publish",
 
@@ -85,9 +86,9 @@
                 },
                 "binDir": "bin/"
             },
+
             "runenv-python-stub": {
-                "registry": { "name": "milaboratories" },
-                "name": "common/runenv-python-stub",
+                "registry": "milaboratories" ,
                 "version": "1.0.0",
                 "type": "environment",
                 "runtime": "python",
@@ -98,11 +99,20 @@
                     "macosx-aarch64": "./build/macosx-aarch64/runenv-python-stub",
                     "windows-x64": "./build/windows-x64/runenv-python-stub"
                 },
-                "binDir": "bin/",
-                "entrypointName": "runenv-python-stub"
+                "binDir": "bin/"
             }
         },
         "entrypoints": {
+            "runenv-java-stub": {
+                "environment": {
+                    "artifact": "runenv-java-stub"
+                }
+            },
+            "runenv-python-stub": {
+                "environment": {
+                    "artifact": "runenv-python-stub"
+                }
+            },
             "hello-world": {
                 "binary": {
                     "artifact": "hello-world",
@@ -121,6 +131,22 @@
                     "cmd": [ "{pkg}/guided-command" ]
                 }
             },
+            "stub-python-script": {
+                "binary": {
+                    "artifact": {
+                        "type": "python",
+                        "registry": "milaboratories",
+                        "version": "1.0.0",
+                        "environment": ":runenv-python-stub",
+                        "dependencies": {
+                            "toolset": "pip",
+                            "requirements": "requirements.txt"
+                        },
+                        "root": "./python-stub"
+                    },
+                    "cmd": [ "python", "{pkg}/hello.py" ]
+                }
+            },
             "read-file-to-stdout-with-sleep": {
                 "binary": {
                     "artifact": "read-with-sleep",
diff --git a/python-stub/hello.py b/python-stub/hello.py
new file mode 100644
index 0000000..382ea10
--- /dev/null
+++ b/python-stub/hello.py
@@ -0,0 +1 @@
+print("Hello from python!")
diff --git a/python-stub/requirements.txt b/python-stub/requirements.txt
new file mode 100644
index 0000000..bc7218b
--- /dev/null
+++ b/python-stub/requirements.txt
@@ -0,0 +1 @@
+click >= 8.0.0
diff --git a/runenv-python-stub.go b/runenv-python-stub.go
index 651457b..0c2bb1b 100644
--- a/runenv-python-stub.go
+++ b/runenv-python-stub.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"fmt"
+	"io"
 	"os"
 	"path/filepath"
 	"strings"
@@ -14,14 +15,8 @@ func main() {
 		fmt.Fprintf(os.Stdout, "%q of python run environment was started with no command and arguments", cmdName)
 	}
 
-	const venvDir = "./venv"
 	const columnWidth = 8
 
-	err := os.MkdirAll(venvDir, 0o750)
-	if err != nil {
-		panic(fmt.Errorf("python stub: failed to create %q dir: %w", venvDir, err))
-	}
-
 	argsReport := strings.Builder{}
 
 	fmt.Fprintf(&argsReport, "%*s = %q\n", columnWidth, "cmd", cmdName)
@@ -31,11 +26,71 @@ func main() {
 	}
 	fmt.Fprintf(&argsReport, "%*s = %d", columnWidth, "time", time.Now().Unix())
 
-	contentFileValue := argsReport.String() + "\n"
+	fmt.Fprint(os.Stdout, argsReport.String()+"\n")
+
+	if isVenvCreation(os.Args) {
+		createFakeVenv(os.Args)
+		fmt.Fprintf(os.Stdout, "venv directory created")
+		return
+	}
+}
+
+func isVenvCreation(args []string) bool {
+	if len(args) < 3 {
+		return false
+	}
+
+	return strings.HasSuffix(args[0], "python") &&
+		args[1] == "-m" && args[2] == "venv"
+}
+
+func createFakeVenv(args []string) {
+	venvDir := args[len(args)-1]
+	binDir := filepath.Join(venvDir, "bin")
+
+	must(
+		os.MkdirAll(binDir, 0o750),
+		"python stub: failed to create %q dir", binDir,
+	)
+
+	must(copyFile(args[0], filepath.Join(binDir, "python")), "failed to put 'python' into %q", binDir)
+	must(copyFile(args[0], filepath.Join(binDir, "pip")), "failed to put 'pip' into %q", binDir)
+}
+
+func copyFile(src, dst string) error {
+	sourceFile, err := os.Open(src)
+	if err != nil {
+		return err
+	}
+	defer sourceFile.Close()
+
+	destFile, err := os.Create(dst)
+	if err != nil {
+		return err
+	}
+	defer destFile.Close()
+
+	_, err = io.Copy(destFile, sourceFile)
+	if err != nil {
+		return err
+	}
+
+	sourceInfo, err := os.Stat(src)
+	if err != nil {
+		return err
+	}
+
+	err = os.Chmod(dst, sourceInfo.Mode())
+	if err != nil {
+		return err
+	}
 
-	contentFilePath := filepath.Join(venvDir, cmdName+".txt")
-	err = os.WriteFile(contentFilePath, []byte(contentFileValue), 0o640)
+	return nil
+}
 
-	fmt.Fprintf(os.Stdout, "file %q created\n", contentFilePath)
-	fmt.Fprint(os.Stdout, contentFileValue)
+func must(err error, msg string, args ...any) {
+	if err != nil {
+		args = append(args, err)
+		panic(fmt.Errorf(msg+": %w", args...))
+	}
 }
diff --git a/scripts/build.sh b/scripts/build.sh
index f6ca652..881e914 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -9,6 +9,14 @@ set -o pipefail
 script_dir="$(cd "$(dirname "${0}")" && pwd)"
 cd "${script_dir}/.."
 
+pkg_content_root() {
+    local _pkg_name="${1}"
+    local _os_reg="${2}"
+    local _arch_reg="${3}"
+
+    echo "${BUILD_DIR}/${_os_reg}-${_arch_reg}/${_pkg_name}"
+}
+
 build_binary() {
     local _pkg_name="${1}"
     local _go_name="${2}"
@@ -19,15 +27,28 @@ build_binary() {
     local _arch_reg="${7}"
     local _ext="${8:-}"
 
-    local _platform="${_os_reg}-${_arch_reg}"
+    local _pkg_root="$(pkg_content_root "${_pkg_name}" "${_os_reg}" "${_arch_reg}")"
 
     printf "## os='%s', arch='%s':\n" "${_os_go}" "${_arch_go}"
     env GOOS="${_os_go}" GOARCH="${_arch_go}" \
         go build \
-        -o "${BUILD_DIR}/${_platform}/${_pkg_name}/${_bin_name}${_ext}" \
+        -o "${_pkg_root}/${_bin_name}${_ext}" \
         "./${_go_name}"
 }
 
+additional_file() {
+    local _pkg_name="${1}"
+    local _os_reg="${2}"
+    local _arch_reg="${3}"
+    local _src="${4}"
+    local _target_name="${5}"
+
+    local _pkg_root="$(pkg_content_root "${_pkg_name}" "${_os_reg}" "${_arch_reg}")"
+
+    cp -R "${_src}" "${_pkg_root}/${_target_name}"
+
+}
+
 build_binaries() {
     local _pkg_name="${1}"
     local _go_name="${2}"
@@ -51,9 +72,37 @@ build_binaries() {
     build_binary "${_pkg_name}" "${_go_name}" "${_bin_name}" "darwin" "arm64" "macosx" "aarch64"
 }
 
+add_file() {
+    local _pkg_name="${1}"
+    local _src="${2}"
+    local _dst="${3}"
+
+    local _pkg_root
+
+    _pkg_root="$(pkg_content_root "${_pkg_name}" "windows" "x64")"
+    mkdir -p "${_pkg_root}"
+    cp -R "${_src}" "${_pkg_root}/${_dst}"
+
+    _pkg_root="$(pkg_content_root "${_pkg_name}" "linux" "x64")"
+    mkdir -p "${_pkg_root}"
+    cp -R "${_src}" "${_pkg_root}/${_dst}"
+
+    _pkg_root="$(pkg_content_root "${_pkg_name}" "linux" "aarch64")"
+    mkdir -p "${_pkg_root}"
+    cp -R "${_src}" "${_pkg_root}/${_dst}"
+
+    _pkg_root="$(pkg_content_root "${_pkg_name}" "macosx" "x64")"
+    mkdir -p "${_pkg_root}"
+    cp -R "${_src}" "${_pkg_root}/${_dst}"
+
+    _pkg_root="$(pkg_content_root "${_pkg_name}" "macosx" "aarch64")"
+    mkdir -p "${_pkg_root}"
+    cp -R "${_src}" "${_pkg_root}/${_dst}"
+}
+
 rm -rf "${script_dir}/${BUILD_DIR}"
 
-build_binaries "runenv-java-stub" "runenv-java-stub.go" "bin/java"
+build_binaries "runenv-java-stub" "dump-args.go" "bin/java"
 
 build_binaries "runenv-python-stub" "runenv-python-stub.go" "bin/python"
 build_binaries "runenv-python-stub" "runenv-python-stub.go" "bin/pip"