diff --git a/.github/workflows/lib.yml b/.github/workflows/lib.yml
index 5b090920f8..a1674ad174 100644
--- a/.github/workflows/lib.yml
+++ b/.github/workflows/lib.yml
@@ -23,7 +23,7 @@ jobs:
       - name: Build gnu libs
         shell: cmd
         run: |
-          set PATH=%PATH%;C:\msys64\mingw64\bin
+          set PATH=C:\msys64\mingw64\bin;%PATH%
           cargo run -p tool_gnu -- all
 
       - name: Build i686_msvc
diff --git a/crates/targets/i686_gnu/lib/libwindows.a b/crates/targets/i686_gnu/lib/libwindows.a
index 1bb2066f21..a1f92cace1 100644
Binary files a/crates/targets/i686_gnu/lib/libwindows.a and b/crates/targets/i686_gnu/lib/libwindows.a differ
diff --git a/crates/targets/i686_msvc/lib/windows.lib b/crates/targets/i686_msvc/lib/windows.lib
index 9fc54a4936..f331d0d872 100644
Binary files a/crates/targets/i686_msvc/lib/windows.lib and b/crates/targets/i686_msvc/lib/windows.lib differ
diff --git a/crates/targets/x86_64_gnu/lib/libwindows.a b/crates/targets/x86_64_gnu/lib/libwindows.a
index 0d54310378..754fcfc39c 100644
Binary files a/crates/targets/x86_64_gnu/lib/libwindows.a and b/crates/targets/x86_64_gnu/lib/libwindows.a differ
diff --git a/crates/targets/x86_64_msvc/lib/windows.lib b/crates/targets/x86_64_msvc/lib/windows.lib
index b17a4c7e11..e55e844bd8 100644
Binary files a/crates/targets/x86_64_msvc/lib/windows.lib and b/crates/targets/x86_64_msvc/lib/windows.lib differ
diff --git a/crates/tools/gnu/src/main.rs b/crates/tools/gnu/src/main.rs
index 2c3c730ded..d2b4c65321 100644
--- a/crates/tools/gnu/src/main.rs
+++ b/crates/tools/gnu/src/main.rs
@@ -109,6 +109,8 @@ EXPORTS
         // Ensure consistency in the prefixes used by dlltool.
         cmd.arg("-t");
         cmd.arg(format!("{library}_").replace('.', "_").replace('-', "_"));
+        // Ensure deterministic output. (dlltool might be built with DEFAULT_AR_DETERMINISTIC=0)
+        cmd.arg("--deterministic-libraries");
     }
     cmd.output().unwrap();
 
diff --git a/crates/tools/msvc/src/main.rs b/crates/tools/msvc/src/main.rs
index 2771900634..871a7a6dcc 100644
--- a/crates/tools/msvc/src/main.rs
+++ b/crates/tools/msvc/src/main.rs
@@ -67,6 +67,8 @@ fn main() {
             break;
         }
     }
+    archive.flush().unwrap();
+    drop(archive);
 
     std::fs::rename(output.join("windows.lib"), format!("crates/targets/{platform}/lib/windows.lib")).unwrap();
 }