diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index f22b737..bfd6072 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -73,6 +73,7 @@ jobs:
           postgres-version: 14
       - run: |
           call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvars64.bat" && ^
+          cd %TEMP% && ^
           nmake /NOLOGO /F Makefile.win && ^
           nmake /NOLOGO /F Makefile.win install && ^
           nmake /NOLOGO /F Makefile.win installcheck && ^
diff --git a/README.md b/README.md
index f74eb20..727a8b7 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@ Then use `nmake` to build:
 
 ```cmd
 set "PGROOT=C:\Program Files\PostgreSQL\16"
+cd %TEMP%
 git clone --branch v0.6.1 https://github.com/pgvector/pgvector.git
 cd pgvector
 nmake /F Makefile.win