diff --git a/implementations/Crafter.Build-External.cpp b/implementations/Crafter.Build-External.cpp
index fc6c1ec..e9d1689 100644
--- a/implementations/Crafter.Build-External.cpp
+++ b/implementations/Crafter.Build-External.cpp
@@ -103,13 +103,9 @@ std::string FetchGit(const GitSource& source, const fs::path& cloneDir) {
         }
     }
 
-    // Random per-invocation tmp suffix so concurrent crafter-build processes
-    // resolving to the same cache key don't share an in-flight `.tmp`
-    // directory — git's pack tempfiles would get yanked when one process
-    // removes or renames the dir out from under the other.
-    std::random_device rd;
     fs::path tmpDir = cloneDir;
-    tmpDir += std::format(".tmp.{:08x}{:08x}", rd(), rd());
+    tmpDir += ".tmp";
+    if (fs::exists(tmpDir)) fs::remove_all(tmpDir);
 
     if (auto err = runGit(std::format("git clone --recursive {} {}", ShellQuote(source.url), ShellQuote(tmpDir.string())))) {
         if (fs::exists(tmpDir)) fs::remove_all(tmpDir);
@@ -132,10 +128,6 @@ std::string FetchGit(const GitSource& source, const fs::path& cloneDir) {
     fs::rename(tmpDir, cloneDir, ec);
     if (ec) {
         fs::remove_all(tmpDir);
-        // If a concurrent build won the race, cloneDir now exists with the
-        // same source revision (cache key includes url+branch+commit), so
-        // discard our clone and reuse theirs.
-        if (fs::exists(cloneDir)) return "";
         return std::format("rename {} -> {} failed: {}", tmpDir.string(), cloneDir.string(), ec.message());
     }
     return "";