diff --git a/.cargo/config.toml.disabled b/.cargo/config.toml.disabled
index 1caaebd5..30c4855d 100644
--- a/.cargo/config.toml.disabled
+++ b/.cargo/config.toml.disabled
@@ -1,3 +1,9 @@
+[source.crates-io]
+replace-with = 'ms-crates-io'
+
+[registries.ms-crates-io]
+index = "sparse+https://pkgs.dev.azure.com/vscode/_packaging/crates/Cargo/index/"
+
 # -Cehcont_guard: Enable EH Continuation Metadata (https://learn.microsoft.com/en-us/cpp/build/reference/guard-enable-eh-continuation-metadata).
 # -Ccontrol-flow-guard: Enable Control Flow Guard, needed for OneBranch's post-build analysis (https://learn.microsoft.com/en-us/cpp/build/reference/guard-enable-control-flow-guard).
 # -Ctarget-feature=+crt-static: Statically link the CRT (required to link the spectre-mitigated CRT).
diff --git a/Cargo.lock b/Cargo.lock
index ab469371..309bd9d9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -60,6 +60,12 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
+[[package]]
+name = "cc"
+version = "1.0.99"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96c51067fd44124faa7f870b4b1c969379ad32b2ba805aa959430ceaa384f695"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -186,9 +192,18 @@ checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "memchr"
-version = "2.7.2"
+version = "2.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
+
+[[package]]
+name = "msvc_spectre_libs"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
+checksum = "6431d928428b689805ff8b2a0687760c3d1aa9845d165535a619e1c028bfbbb1"
+dependencies = [
+ "cc",
+]
 
 [[package]]
 name = "pet"
@@ -197,6 +212,7 @@ dependencies = [
  "clap",
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-conda",
  "pet-core",
  "pet-env-var-path",
@@ -226,6 +242,7 @@ name = "pet-cache"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -239,6 +256,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -254,6 +272,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-fs",
  "pet-python-utils",
  "regex",
@@ -267,6 +286,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-conda",
  "pet-core",
  "pet-fs",
@@ -280,6 +300,7 @@ name = "pet-fs"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
 ]
 
 [[package]]
@@ -287,6 +308,7 @@ name = "pet-global"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
 ]
 
 [[package]]
@@ -294,6 +316,7 @@ name = "pet-global-virtualenvs"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-conda",
  "pet-core",
  "pet-fs",
@@ -306,6 +329,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -321,6 +345,7 @@ version = "0.1.0"
 dependencies = [
  "env_logger",
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "serde",
  "serde_json",
@@ -331,6 +356,7 @@ name = "pet-linux-global-python"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -341,6 +367,7 @@ name = "pet-mac-commandlinetools"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -351,6 +378,7 @@ name = "pet-mac-python-org"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -361,6 +389,7 @@ name = "pet-pipenv"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -370,6 +399,9 @@ dependencies = [
 [[package]]
 name = "pet-poetry"
 version = "0.1.0"
+dependencies = [
+ "msvc_spectre_libs",
+]
 
 [[package]]
 name = "pet-pyenv"
@@ -377,6 +409,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-conda",
  "pet-core",
  "pet-fs",
@@ -393,6 +426,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-fs",
  "regex",
  "serde",
@@ -405,6 +439,7 @@ version = "0.1.0"
 dependencies = [
  "env_logger",
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-jsonrpc",
  "serde",
@@ -429,6 +464,7 @@ name = "pet-venv"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-python-utils",
  "pet-virtualenv",
@@ -439,6 +475,7 @@ name = "pet-virtualenv"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -449,6 +486,7 @@ name = "pet-virtualenvwrapper"
 version = "0.1.0"
 dependencies = [
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
@@ -461,6 +499,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-conda",
  "pet-core",
  "pet-fs",
@@ -476,6 +515,7 @@ version = "0.1.0"
 dependencies = [
  "lazy_static",
  "log",
+ "msvc_spectre_libs",
  "pet-core",
  "pet-fs",
  "pet-python-utils",
diff --git a/Cargo.toml b/Cargo.toml
index 997c8d25..7fabbe05 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,4 +5,8 @@ resolver = "2"
 [profile.release]
 strip = true
 lto = true
-codegen-units = 1
\ No newline at end of file
+codegen-units = 1
+# Enable full debug info for optimized builds.
+debug = "full"
+# Split debuginfo into its own file to reduce binary size.
+split-debuginfo = "packed"
diff --git a/crates/pet-cache/Cargo.toml b/crates/pet-cache/Cargo.toml
index 192f7517..a37e838d 100644
--- a/crates/pet-cache/Cargo.toml
+++ b/crates/pet-cache/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-cache"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-fs = { path = "../pet-fs" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-conda/Cargo.toml b/crates/pet-conda/Cargo.toml
index 8af01148..5e30df55 100644
--- a/crates/pet-conda/Cargo.toml
+++ b/crates/pet-conda/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-conda"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-fs = { path = "../pet-fs" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-core/Cargo.toml b/crates/pet-core/Cargo.toml
index 0c230a95..2f7d4b38 100644
--- a/crates/pet-core/Cargo.toml
+++ b/crates/pet-core/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-core"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-fs = { path = "../pet-fs" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-env-var-path/Cargo.toml b/crates/pet-env-var-path/Cargo.toml
index fb2e2e33..0c517c55 100644
--- a/crates/pet-env-var-path/Cargo.toml
+++ b/crates/pet-env-var-path/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-env-var-path"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
diff --git a/crates/pet-fs/Cargo.toml b/crates/pet-fs/Cargo.toml
index 2d2e9a56..12352ceb 100644
--- a/crates/pet-fs/Cargo.toml
+++ b/crates/pet-fs/Cargo.toml
@@ -3,5 +3,8 @@ name = "pet-fs"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 log = "0.4.21"
diff --git a/crates/pet-global-virtualenvs/Cargo.toml b/crates/pet-global-virtualenvs/Cargo.toml
index 4a20597d..c4a60e78 100644
--- a/crates/pet-global-virtualenvs/Cargo.toml
+++ b/crates/pet-global-virtualenvs/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-global-virtualenvs"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
diff --git a/crates/pet-global/Cargo.toml b/crates/pet-global/Cargo.toml
index be57c1f0..ad17f16b 100644
--- a/crates/pet-global/Cargo.toml
+++ b/crates/pet-global/Cargo.toml
@@ -3,5 +3,8 @@ name = "pet-global"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 log = "0.4.21"
diff --git a/crates/pet-homebrew/Cargo.toml b/crates/pet-homebrew/Cargo.toml
index 5f2bca32..961a7886 100644
--- a/crates/pet-homebrew/Cargo.toml
+++ b/crates/pet-homebrew/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-homebrew"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-fs = { path = "../pet-fs" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-jsonrpc/Cargo.toml b/crates/pet-jsonrpc/Cargo.toml
index 76b68bd5..75788852 100644
--- a/crates/pet-jsonrpc/Cargo.toml
+++ b/crates/pet-jsonrpc/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-jsonrpc"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 serde = { version = "1.0.152", features = ["derive"] }
 serde_json = "1.0.93"
diff --git a/crates/pet-linux-global-python/Cargo.toml b/crates/pet-linux-global-python/Cargo.toml
index 08a02e02..9334b3fe 100644
--- a/crates/pet-linux-global-python/Cargo.toml
+++ b/crates/pet-linux-global-python/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-linux-global-python"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-mac-commandlinetools/Cargo.toml b/crates/pet-mac-commandlinetools/Cargo.toml
index 9910e997..ba7b75b6 100644
--- a/crates/pet-mac-commandlinetools/Cargo.toml
+++ b/crates/pet-mac-commandlinetools/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-mac-commandlinetools"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-mac-python-org/Cargo.toml b/crates/pet-mac-python-org/Cargo.toml
index f93958bb..ba3b60f5 100644
--- a/crates/pet-mac-python-org/Cargo.toml
+++ b/crates/pet-mac-python-org/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-mac-python-org"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-pipenv/Cargo.toml b/crates/pet-pipenv/Cargo.toml
index 6c7eb069..633e7c68 100644
--- a/crates/pet-pipenv/Cargo.toml
+++ b/crates/pet-pipenv/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-pipenv"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
diff --git a/crates/pet-poetry/Cargo.toml b/crates/pet-poetry/Cargo.toml
index 06cc7b6d..d262f60c 100644
--- a/crates/pet-poetry/Cargo.toml
+++ b/crates/pet-poetry/Cargo.toml
@@ -3,4 +3,7 @@ name = "pet-poetry"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
diff --git a/crates/pet-pyenv/Cargo.toml b/crates/pet-pyenv/Cargo.toml
index 9f9ef48a..4b709272 100644
--- a/crates/pet-pyenv/Cargo.toml
+++ b/crates/pet-pyenv/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-pyenv"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 serde = { version = "1.0.152", features = ["derive"] }
 serde_json = "1.0.93"
diff --git a/crates/pet-python-utils/Cargo.toml b/crates/pet-python-utils/Cargo.toml
index d62e5045..6ec58b65 100644
--- a/crates/pet-python-utils/Cargo.toml
+++ b/crates/pet-python-utils/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-python-utils"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 lazy_static = "1.4.0"
 regex = "1.10.4"
diff --git a/crates/pet-reporter/Cargo.toml b/crates/pet-reporter/Cargo.toml
index 71ff3b6f..7c1c2416 100644
--- a/crates/pet-reporter/Cargo.toml
+++ b/crates/pet-reporter/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-reporter"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-jsonrpc = { path = "../pet-jsonrpc" }
diff --git a/crates/pet-venv/Cargo.toml b/crates/pet-venv/Cargo.toml
index a05211cd..f2749b99 100644
--- a/crates/pet-venv/Cargo.toml
+++ b/crates/pet-venv/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-venv"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-virtualenv = { path = "../pet-virtualenv" }
diff --git a/crates/pet-virtualenv/Cargo.toml b/crates/pet-virtualenv/Cargo.toml
index 6e5edc7f..4e906630 100644
--- a/crates/pet-virtualenv/Cargo.toml
+++ b/crates/pet-virtualenv/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-virtualenv"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
diff --git a/crates/pet-virtualenvwrapper/Cargo.toml b/crates/pet-virtualenvwrapper/Cargo.toml
index fedea302..81e0193f 100644
--- a/crates/pet-virtualenvwrapper/Cargo.toml
+++ b/crates/pet-virtualenvwrapper/Cargo.toml
@@ -3,6 +3,9 @@ name = "pet-virtualenvwrapper"
 version = "0.1.0"
 edition = "2021"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-fs = { path = "../pet-fs" }
 pet-core = { path = "../pet-core" }
diff --git a/crates/pet-windows-registry/Cargo.toml b/crates/pet-windows-registry/Cargo.toml
index 7012b0bd..2e60cbd6 100644
--- a/crates/pet-windows-registry/Cargo.toml
+++ b/crates/pet-windows-registry/Cargo.toml
@@ -6,6 +6,9 @@ edition = "2021"
 [target.'cfg(windows)'.dependencies]
 winreg = "0.52.0"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-windows-store = { path = "../pet-windows-store" }
 pet-python-utils = { path = "../pet-python-utils" }
diff --git a/crates/pet-windows-registry/src/lib.rs b/crates/pet-windows-registry/src/lib.rs
index 57909260..4d0d006f 100644
--- a/crates/pet-windows-registry/src/lib.rs
+++ b/crates/pet-windows-registry/src/lib.rs
@@ -28,7 +28,7 @@ impl WindowsRegistry {
     }
     #[cfg(windows)]
     fn find_with_cache(&self) -> Option<LocatorResult> {
-        let mut envs = self.environments.read().unwrap();
+        let envs = self.environments.read().unwrap();
         if let Some(environments) = envs.as_ref() {
             Some(LocatorResult {
                 managers: vec![],
diff --git a/crates/pet-windows-store/Cargo.toml b/crates/pet-windows-store/Cargo.toml
index 521767d6..c009e884 100644
--- a/crates/pet-windows-store/Cargo.toml
+++ b/crates/pet-windows-store/Cargo.toml
@@ -6,6 +6,9 @@ edition = "2021"
 [target.'cfg(windows)'.dependencies]
 winreg = "0.52.0"
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [dependencies]
 pet-core = { path = "../pet-core" }
 pet-fs = { path = "../pet-fs" }
diff --git a/crates/pet/Cargo.toml b/crates/pet/Cargo.toml
index ca394e00..aaaf4e96 100644
--- a/crates/pet/Cargo.toml
+++ b/crates/pet/Cargo.toml
@@ -7,6 +7,9 @@ edition = "2021"
 pet-windows-store = { path = "../pet-windows-store" }
 pet-windows-registry = { path = "../pet-windows-registry" }
 
+[target.'cfg(target_os = "windows")'.dependencies]
+msvc_spectre_libs = { version = "0.1.1", features = ["error"] }
+
 [target.'cfg(unix)'.dependencies]
 pet-homebrew = { path = "../pet-homebrew" }