diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 83c0f25..906cd1a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -65,7 +65,7 @@ jobs:
           "$PY" -m pip install -r engine/requirements.txt pyftpdlib
           cp tests/fake_ps5.py "$S/"
           python engine/make_fake_dump.py "$S/fakedump/PPSA00001-app"
-          echo "PACKER_E2E_SCRATCH=$S" >> "$GITHUB_ENV"
+          echo "PROSPACK_E2E_SCRATCH=$S" >> "$GITHUB_ENV"
           echo "PROSPACK_ENGINE=$(cd src-tauri/binaries && pwd)/$(ls src-tauri/binaries | head -1)" >> "$GITHUB_ENV"
 
       - name: App tests (unit + end-to-end)
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ceab841..703862f 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -61,7 +61,7 @@ jobs:
           "$PY" -m pip install -r engine/requirements.txt pyftpdlib
           cp tests/fake_ps5.py "$S/"
           python engine/make_fake_dump.py "$S/fakedump/PPSA00001-app"
-          export PACKER_E2E_SCRATCH="$S"
+          export PROSPACK_E2E_SCRATCH="$S"
           export PROSPACK_ENGINE="$(cd src-tauri/binaries && pwd)/$(ls src-tauri/binaries | head -1)"
           cargo test --manifest-path src-tauri/Cargo.toml -- --include-ignored --skip discover_lan
 
diff --git a/.gitignore b/.gitignore
index aab93d9..3968dc7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,3 +7,4 @@ public/mock/
 src-tauri/binaries/
 installer/src-tauri/payload/
 *.bak
+__pycache__/
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8551fa3..50cc40c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -42,7 +42,7 @@ fake PS5. They never touch a real console. They need a scratch folder containing
 - `fakedump/PPSA00001-app`: from `python engine/make_fake_dump.py <scratch>/fakedump/PPSA00001-app`.
 
 ```bash
-PACKER_E2E_SCRATCH=<scratch> PROSPACK_ENGINE=$PWD/binaries/prospack-engine-<triple> cargo test -- --include-ignored
+PROSPACK_E2E_SCRATCH=<scratch> PROSPACK_ENGINE=$PWD/binaries/prospack-engine-<triple> cargo test -- --include-ignored
 ```
 
 The scenarios covered are:
diff --git a/src-tauri/src/engine.rs b/src-tauri/src/engine.rs
index b9232c5..f5cdc99 100644
--- a/src-tauri/src/engine.rs
+++ b/src-tauri/src/engine.rs
@@ -508,12 +508,12 @@ mod tests {
 mod cancel_test {
     use super::*;
 
-    /// PACKER_E2E_SCRATCH=<dir with mkvenv> cargo test cancel -- --ignored
+    /// PROSPACK_E2E_SCRATCH=<dir with mkvenv> cargo test cancel -- --ignored
     #[test]
     #[ignore]
     #[cfg(unix)]
     fn cancel_kills_mkpfs_promptly() {
-        let scratch = PathBuf::from(std::env::var("PACKER_E2E_SCRATCH").unwrap());
+        let scratch = PathBuf::from(std::env::var("PROSPACK_E2E_SCRATCH").unwrap());
         let tmp = tempfile::tempdir().unwrap();
         let root = tmp.path().join("engine");
         std::fs::create_dir_all(&root).unwrap();
diff --git a/src-tauri/src/pipeline.rs b/src-tauri/src/pipeline.rs
index 63f97ee..e2f4f94 100644
--- a/src-tauri/src/pipeline.rs
+++ b/src-tauri/src/pipeline.rs
@@ -871,7 +871,7 @@ mod tests {
 }
 
 /// End-to-end run against a local fake PS5 (FTP + fake ShadowMountPlus). Never touches a real
-/// console. Run with: PACKER_E2E_SCRATCH=<dir with mkvenv, fake_ps5.py, fakedump> cargo test e2e -- --ignored
+/// console. Run with: PROSPACK_E2E_SCRATCH=<dir with mkvenv, fake_ps5.py, fakedump> cargo test e2e -- --ignored
 #[cfg(test)]
 mod e2e {
     use super::*;
@@ -903,7 +903,7 @@ mod e2e {
     #[test]
     #[ignore]
     fn e2e_local_fake_ps5() {
-        let scratch = PathBuf::from(std::env::var("PACKER_E2E_SCRATCH").expect("PACKER_E2E_SCRATCH"));
+        let scratch = PathBuf::from(std::env::var("PROSPACK_E2E_SCRATCH").expect("PROSPACK_E2E_SCRATCH"));
         let tmp = tempfile::tempdir().unwrap();
         std::env::set_var("PROSPACK_CONFIG_DIR", tmp.path().join("config"));
         std::env::set_var("PROSPACK_DATA_DIR", tmp.path().join("data"));