Add instructions to install libblst manually

docs/getting-started/install.md

@@ -178,6 +178,34 @@ make check
 sudo make install
 ```
 
+#### Installing BLST
+
+Download and install BLST so that cardano-base can pick it up (assumes pkg-config is installed):
+
+```
+git clone https://github.com/supranational/blst
+cd blst
+git checkout v0.3.10
+./build.sh
+cat > libblst.pc << EOF
+prefix=/usr/local
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: libblst
+Description: Multilingual BLS12-381 signature library
+URL: https://github.com/supranational/blst
+Version: 0.3.10
+Cflags: -I${includedir}
+Libs: -L${libdir} -lblst
+EOF
+sudo cp libblst.pc /usr/local/lib/pkgconfig/
+sudo cp bindings/blst_aux.h bindings/blst.h bindings/blst.hpp  /usr/local/include/
+sudo cp libblst.a /usr/local/lib
+sudo chmod u=rw,go=r /usr/local/{lib/{libblst.a,pkgconfig/libblst.pc},include/{blst.{h,hpp},blst_aux.h}}
+```
+
 #### Downloading the source code for cardano-node
 
 Create a working directory for your builds: