diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0751b54..66a6ee4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,7 @@ on:
 
 env:
   CARGO_TERM_COLOR: always
+  WX_WIDGETS_BUILD_OUT_DIR: "wx-widgets-build"
 
 jobs:
   build:
@@ -37,6 +38,13 @@ jobs:
         run: |
           cargo install rust-script --version "0.7.0"
           cargo install cargo-make --version 0.34.0
+      - name: "Cache wxWidgets builds"
+        if: ${{ runner.os != 'Linux' }}
+        uses: actions/cache@v3
+        with:
+          path: |
+            wx-widgets-build/
+          key: ${{ runner.os }}-${{ hashFiles('espanso-modulo/build.rs') }}-${{ hashFiles('espanso-modulo/vendor/*') }}
       - name: Build
         run: |
           cargo make build-binary
@@ -70,6 +78,13 @@ jobs:
         run: |
           cargo install rust-script --version "0.7.0"
           cargo install cargo-make --version 0.34.0
+      - name: "Cache wxWidgets builds"
+        if: ${{ runner.os != 'Linux' }}
+        uses: actions/cache@v3
+        with:
+          path: |
+            wx-widgets-build/
+          key: ${{ runner.os }}-${{ hashFiles('espanso-modulo/build.rs') }}-${{ hashFiles('espanso-modulo/vendor/*') }}
       - name: Run test suite
         run: cargo make test-binary
   
@@ -128,6 +143,13 @@ jobs:
         run: |
           cargo install rust-script --version "0.7.0"
           cargo install cargo-make --version 0.34.0
+      - name: "Cache wxWidgets builds"
+        if: ${{ runner.os != 'Linux' }}
+        uses: actions/cache@v3
+        with:
+          path: |
+            wx-widgets-build/
+          key: ${{ runner.os }}-${{ hashFiles('espanso-modulo/build.rs') }}-${{ hashFiles('espanso-modulo/vendor/*') }}
       - name: Build
         run: |
           cargo make build-macos-arm-binary
diff --git a/espanso-modulo/build.rs b/espanso-modulo/build.rs
index 5c5570d..752c26f 100644
--- a/espanso-modulo/build.rs
+++ b/espanso-modulo/build.rs
@@ -25,6 +25,9 @@ use std::path::Path;
 #[cfg(not(target_os = "linux"))]
 const WX_WIDGETS_ARCHIVE_NAME: &str = "wxWidgets-3.1.5.zip";
 
+#[cfg(not(target_os = "linux"))]
+const WX_WIDGETS_BUILD_OUT_DIR_ENV_NAME: &str = "WX_WIDGETS_BUILD_OUT_DIR";
+
 #[cfg(target_os = "windows")]
 fn build_native() {
   use std::process::Command;
@@ -36,7 +39,17 @@ fn build_native() {
     panic!("could not find wxWidgets archive!");
   }
 
-  let out_dir = PathBuf::from(std::env::var("OUT_DIR").expect("missing OUT_DIR"));
+  let out_dir = if let Ok(out_path) = std::env::var(WX_WIDGETS_BUILD_OUT_DIR_ENV_NAME) {
+    println!(
+      "detected wxWidgets build output directory override: {}",
+      out_path
+    );
+    let path = PathBuf::from(out_path);
+    std::fs::create_dir_all(&path).expect("unable to create wxWidgets out dir");
+    path
+  } else {
+    PathBuf::from(std::env::var("OUT_DIR").expect("missing OUT_DIR"))
+  };
   let out_wx_dir = out_dir.join("wx");
 
   if !out_wx_dir.is_dir() {
@@ -154,7 +167,17 @@ fn build_native() {
     panic!("could not find wxWidgets archive!");
   }
 
-  let out_dir = PathBuf::from(std::env::var("OUT_DIR").expect("missing OUT_DIR"));
+  let out_dir = if let Ok(out_path) = std::env::var(WX_WIDGETS_BUILD_OUT_DIR_ENV_NAME) {
+    println!(
+      "detected wxWidgets build output directory override: {}",
+      out_path
+    );
+    let path = PathBuf::from(out_path);
+    std::fs::create_dir_all(&path).expect("unable to create wxWidgets out dir");
+    path
+  } else {
+    PathBuf::from(std::env::var("OUT_DIR").expect("missing OUT_DIR"))
+  };
   let out_wx_dir = out_dir.join("wx");
 
   let target_arch = match std::env::var("CARGO_CFG_TARGET_ARCH")