diff --git a/BUILD.bazel b/BUILD.bazel
index a8ded62..1ef1e5d 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -1,3 +1,4 @@
+load("@aspect_bazel_lib//lib:run_binary.bzl", "run_binary")
 load("@bazel_gazelle//:def.bzl", "gazelle")
 load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
 
@@ -6,3 +7,16 @@ load("@com_github_bazelbuild_buildtools//buildifier:def.bzl", "buildifier")
 gazelle(
     name = "gazelle",
 )
+
+# $ bazel build //cmd/ls-proc
+# $ cp -f bazel-bin/cmd/ls-proc/ls-proc_/ls-proc ls-proc
+run_binary(
+    name = "introspection",
+    outs = ["out"],
+    args = ["$(location out)"],
+    execution_requirements = {
+        "no-cache": "1",
+    },
+    tool = ":ls-proc",
+    srcs = ["usr/bin/env"],
+)
diff --git a/cmd/ls-proc/BUILD.bazel b/cmd/ls-proc/BUILD.bazel
new file mode 100644
index 0000000..57e2e7b
--- /dev/null
+++ b/cmd/ls-proc/BUILD.bazel
@@ -0,0 +1,15 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_binary", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["main.go"],
+    importpath = "github.com/buildbarn/bb-deployments/cmd/ls-proc",
+    visibility = ["//visibility:private"],
+)
+
+go_binary(
+    name = "ls-proc",
+    embed = [":go_default_library"],
+    visibility = ["//visibility:public"],
+    pure = "on",
+)
diff --git a/cmd/ls-proc/main.go b/cmd/ls-proc/main.go
new file mode 100644
index 0000000..771b8a1
--- /dev/null
+++ b/cmd/ls-proc/main.go
@@ -0,0 +1,24 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"log"
+)
+
+func main() {
+	entries, err := os.ReadDir("/proc/self")
+	if err != nil {
+		log.Fatal("Reading /proc/self:", err)
+	}
+
+	max := 10
+	for i, e := range entries {
+		if i > max {
+			break
+		}
+		fmt.Println(e.Name())
+	}
+
+	os.Create(os.Args[1])
+}
diff --git a/ls-proc b/ls-proc
new file mode 100755
index 0000000..011b4bb
Binary files /dev/null and b/ls-proc differ
diff --git a/usr/bin/env b/usr/bin/env
new file mode 100755
index 0000000..6b888df
Binary files /dev/null and b/usr/bin/env differ