diff --git a/Cargo.lock b/Cargo.lock
index 64bb7f3..a07b451 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -169,6 +169,27 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users",
+ "windows-sys",
+]
+
 [[package]]
 name = "errno"
 version = "0.3.14"
@@ -201,6 +222,17 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
+[[package]]
+name = "getrandom"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.3.4"
@@ -220,6 +252,7 @@ dependencies = [
  "anyhow",
  "blake3",
  "clap",
+ "dirs",
  "lager",
  "named-lock",
 ]
@@ -248,7 +281,7 @@ version = "0.1.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9afb3de4395d6b3e67a780b6de64b51c978ecf11cb9a462c66be7d4ca9039d33"
 dependencies = [
- "getrandom",
+ "getrandom 0.3.4",
  "libc",
 ]
 
@@ -270,6 +303,15 @@ version = "0.2.186"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "68ab91017fe16c622486840e4c83c9a37afeff978bd239b5293d61ece587de66"
 
+[[package]]
+name = "libredox"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e02f3bb43d335493c96bf3fd3a321600bf6bd07ed34bc64118e9293bdffea46c"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.12.1"
@@ -310,6 +352,12 @@ version = "1.70.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "384b8ab6d37215f3c5301a95a4accb5d64aa607f1fcb26a11b5303878451b4fe"
 
+[[package]]
+name = "option-ext"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.5"
@@ -409,6 +457,17 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
+dependencies = [
+ "getrandom 0.2.17",
+ "libredox",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "remove_dir_all"
 version = "0.5.3"
@@ -558,6 +617,12 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "wasi"
+version = "0.11.1+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
+
 [[package]]
 name = "wasip2"
 version = "1.0.3+wasi-0.2.9"
diff --git a/halide-cache/Cargo.toml b/halide-cache/Cargo.toml
index a8acd18..d045a62 100644
--- a/halide-cache/Cargo.toml
+++ b/halide-cache/Cargo.toml
@@ -9,3 +9,4 @@ blake3 = "1.8.2"
 clap = { version = "4.5.53", features = ["derive"] }
 named-lock = "0.4.1"
 anyhow = "1.0.102"
+dirs = "6.0.0"
diff --git a/halide-cache/src/main.rs b/halide-cache/src/main.rs
index 085055a..5f20788 100644
--- a/halide-cache/src/main.rs
+++ b/halide-cache/src/main.rs
@@ -1,9 +1,10 @@
 use clap::Parser;
+use dirs::home_dir;
 use lager::{Address, LRU, Lager};
 use named_lock::NamedLock;
+use std::fs;
 use std::path::{Path, PathBuf};
 use std::process::Command;
-use std::{env, fs};
 
 #[derive(Parser, Debug)]
 struct Args {
@@ -15,6 +16,8 @@ struct Args {
     generated_header: PathBuf,
     #[arg(long)]
     base_dir: Option<PathBuf>,
+    #[arg(long, default_value_os_t = home_dir().unwrap().join(".cache/halide-cache"))]
+    cache_dir: PathBuf,
     #[arg(last = true)]
     builder: Vec<String>,
 }
@@ -64,9 +67,9 @@ impl<'a> Dependencies<'a> {
 fn main() -> anyhow::Result<()> {
     let args = Args::parse();
 
-    let cache_dir = env::var("HALIDE_CACHE_DIR")?;
+    let cache_dir = args.cache_dir;
 
-    if !Path::new(&cache_dir).exists() {
+    if !cache_dir.exists() {
         fs::create_dir_all(&cache_dir)?;
     }