DOC: Update readme and fmt cmake

Author: RuhiRG

README.md

@@ -79,10 +79,11 @@ Now the installation can proceed.
 ```bash
 mkdir build
 cd build
+export EIGEN3_INCLUDE_DIR=$CONDA_PREFIX/include/eigen3
 cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_EXPORT_COMPILE_COMMANDS=YES -DCMAKE_INSTALL_PREFIX:PATH=$CONDA_PREFIX ../
 make -j$(nproc)
 make install
-$CONDA_PREFIX/bin/yodaStruct -c lua_inputs/config.yml
+LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$CONDA_PREFIX/lib $CONDA_PREFIX/bin/yodaStruct -c lua_inputs/config.yml
 ```
 
 We have opted to install into the `conda` environment, if this is not the

src/CMakeLists.txt

@@ -43,8 +43,9 @@ add_definitions(-DBOOST_ERROR_CODE_HEADER_ONLY)
 find_package(
   "Lua" REQUIRED
   "Boost" REQUIRED COMPONENTS system filesystem
-  "yaml-cpp"
-  "fmt")
+  "yaml-cpp")
+
+find_package(fmt REQUIRED)
 
 link_directories(${Boost_LIBRARY_DIRS})
 # Link everything
@@ -53,7 +54,7 @@ target_link_libraries(
   ${Boost_LIBRARIES}
   Eigen3::Eigen
   ${LUA_LIBRARIES}
-  fmt
+  fmt::fmt
   yaml-cpp
   yodaLib
   )