try phpize

.gitlab-ci.yml

@@ -19,3 +19,7 @@ build:
     - sleep 60
     - wget -UseBasicParsing -OutFile git-setup.exe https://github.com/git-for-windows/git/releases/download/v2.42.0.windows.2/PortableGit-2.42.0.2-64-bit.7z.exe
     - ./git-setup.exe -o"C:\git" -y
+    - $env:Path += ';C:\git'
+    - git clone https://github.com/open-telemetry/opentelemetry-php
+    - cd opentelemetry-php
+    - c:\php\phpize
\ No newline at end of file