diff --git a/ui/build/ninja.go b/ui/build/ninja.go
index f5f637f..ced1e20 100644
--- a/ui/build/ninja.go
+++ b/ui/build/ninja.go
@@ -17,6 +17,7 @@
 import (
 	"fmt"
 	"os"
+	"os/exec"
 	"path/filepath"
 	"sort"
 	"strconv"
@@ -339,3 +340,40 @@
 	}
 	c.prevModTime = newModTime
 }
+
+// Constructs and runs the Ninja command line to get the inputs of a goal.
+// For now, this will always run ninja, because ninjago, n2 and siso don't have the
+// `-t inputs` command.  This command will use the inputs command's -d option,
+// to use the dep file iff ninja was the executor. For other executors, the
+// results will be wrong.
+func runNinjaInputs(ctx Context, config Config, goal string) ([]string, error) {
+	executable := config.PrebuiltBuildTool("ninja")
+
+	args := []string{
+		"-f",
+		config.CombinedNinjaFile(),
+		"-t",
+		"inputs",
+	}
+	// Add deps file arg for ninja
+	// TODO: Update as inputs command is implemented
+	if config.ninjaCommand == NINJA_NINJA && !config.UseABFS() {
+		args = append(args, "-d")
+	}
+	args = append(args, goal)
+
+	// This is just ninja -t inputs, so we won't bother running it in the sandbox,
+	// so use exec.Command, not soong_ui's command.
+	cmd := exec.Command(executable, args...)
+
+	cmd.Stdin = os.Stdin
+	cmd.Stderr = os.Stderr
+
+	out, err := cmd.Output()
+	if err != nil {
+		fmt.Printf("Error getting goal inputs for %s: %s\n", goal, err)
+		return nil, err
+	}
+
+	return strings.Split(strings.TrimSpace(string(out)), "\n"), nil
+}