Development
Linux: Building the httpfs Extension Fails
**Problem:**
When building the [`httpfs` extension](#docs:extensions:httpfs:overview) on Linux, the build may fail with the following error.  
```console
CMake Error at /usr/share/cmake-3.22/Modules/FindPackageHandleStandardArgs.cmake:230 (message):
Could NOT find OpenSSL, try to set the path to OpenSSL root folder in the
system variable OPENSSL_ROOT_DIR (missing: OPENSSL_CRYPTO_LIBRARY
OPENSSL_INCLUDE_DIR)
```  
**Solution:**
Install the `libssl-dev` library.  
```bash
sudo apt-get install -y libssl-dev
```  
Then, build with:  
```bash
GEN=ninja CORE_EXTENSIONS="httpfs" make
```