capnp release pinning is a nightmare actually

capnp does not publish release binaries for linux. i hope this caches

.github/workflows/build.yml

@@ -35,7 +35,7 @@ jobs:
 
           cargo fmt --check
 
-      - name: build
+      - name: set up codegen dependencies
         shell: bash
         run: |
 
@@ -54,11 +54,21 @@ jobs:
             wget "https://github.com/google/flatbuffers/releases/download/v23.5.26/Linux.flatc.binary.clang++-12.zip" -O flatbuffers.zip
             unzip flatbuffers.zip
             chmod +x flatc
-            mv flatc /usr/local/bin
+            mv ./flatc /usr/local/bin
           )
 
-          sudo apt-get install -y capnproto=0.9.2-3
+          wget "https://capnproto.org/capnproto-c++-1.0.2.tar.gz" -O capnproto.tar.gz
+          tar zxf capnproto.tar.gz
+          (
+            cd capnproto-c++-1.0.2
+            ./configure
+            make -j
+            mv ./capnp /usr/local/bin
+          )
 
+      - name: build
+        shell: bash
+        run: |
           cargo build --benches --features regenerate-capnp,regenerate-flatbuffers,regenerate-prost
 
       - name: check generated code