jsonnet: Build with cmake (#236510)

The current build doesn't install all necessary libraries to
use jsonnet from c/c++

pkgs/development/compilers/jsonnet/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, jekyll, fetchFromGitHub }:
+{ stdenv, lib, jekyll, cmake, fetchFromGitHub, gtest }:
 
 stdenv.mkDerivation rec {
   pname = "jsonnet";
@@ -12,28 +12,21 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-FtVJE9alEl56Uik+nCpJMV5DMVVmRCnE1xMAiWdK39Y=";
   };
 
-  nativeBuildInputs = [ jekyll ];
+  nativeBuildInputs = [ jekyll cmake ];
+  buildInputs = [ gtest ];
+
+  cmakeFlags = ["-DBUILD_STATIC_LIBS=ON" "-DUSE_SYSTEM_GTEST=ON" ];
 
   enableParallelBuilding = true;
 
-  makeFlags = [
-    "jsonnet"
-    "jsonnetfmt"
-    "libjsonnet.so"
-  ];
-
   # Upstream writes documentation in html, not in markdown/rst, so no
   # other output formats, sorry.
-  preBuild = ''
-    jekyll build --source ./doc --destination ./html
+  postBuild = ''
+    jekyll build --source ../doc --destination ./html
   '';
 
-  installPhase = ''
-    mkdir -p $out/bin $out/lib $out/include $out/share/doc/jsonnet
-    cp jsonnet $out/bin/
-    cp jsonnetfmt $out/bin/
-    cp libjsonnet*.so $out/lib/
-    cp -a include/*.h $out/include/
+  postInstall = ''
+    mkdir -p $out/share/doc/jsonnet
     cp -r ./html $out/share/doc/jsonnet
   '';