diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..ebee749
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,5 @@
+default:
+	virtualenv venv && source venv/bin/activate && pip install -r requirements.txt
+
+run:
+	source venv/bin/activate && ./slice.py ${DIR}
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..88b5db0
--- /dev/null
+++ b/README.md
@@ -0,0 +1,2 @@
+run `make` to install it, then do `make DIR=/wherever/your/files/are/ run` to
+run it
diff --git a/slice.py b/slice.py
index d455cd3..984359c 100755
--- a/slice.py
+++ b/slice.py
@@ -48,14 +48,16 @@ def silence(infile):
     convert(infile)
 
 def silence_all():
-    local("mkdir -p ./shortened")
-    fileset = local("ls .", capture=True).split("\n")
-    shuffle(fileset)
-    for f in fileset:
-        if f.split(".")[-1] in ["ogg", "opus", "m4a", "mp3"]:
-            try:
-                silence(f)
-            except Exception:
-                pass
+    with lcd(argv[1]):
+        local("mkdir -p ./shortened")
+        fileset = local("ls .", capture=True).split("\n")
+        shuffle(fileset)
+        for f in fileset:
+            if f.split(".")[-1] in ["ogg", "opus", "m4a", "mp3"]:
+                try:
+                    silence(f)
+                    local("rm -f /tmp/*wav")
+                except Exception:
+                    pass
 
 silence_all()