diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 602e2c8f..c81adb62 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -35,7 +35,7 @@ jobs:
           echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-${{ matrix.llvm }} main" | sudo tee /etc/apt/sources.list.d/llvm.list
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
           sudo apt-get update
-          sudo apt-get install -y --no-install-recommends llvm-${{ matrix.llvm }}-dev clang-${{ matrix.llvm }} lld-${{ matrix.llvm }} libgc-dev
+          sudo apt-get install -y llvm-${{ matrix.llvm }}-dev clang-${{ matrix.llvm }} lld-${{ matrix.llvm }} pkg-config libgc-dev libcjson-dev libsqlite3-dev python3.11-dev
           echo /usr/lib/llvm-${{ matrix.llvm }}/bin >> $GITHUB_PATH
     
       - name: Clang information
diff --git a/README.md b/README.md
index 5cd84387..e0dd75b7 100644
--- a/README.md
+++ b/README.md
@@ -211,6 +211,18 @@ Here are the Go packages that can be imported correctly:
 * [sync/atomic](https://pkg.go.dev/sync/atomic) (partially)
 
 
+## Dependencies
+
+- [Go 1.20+](https://go.dev) (build only)
+- [LLVM 17](https://llvm.org)
+- [Clang 17](https://clang.llvm.org)
+- [LLD 17](https://lld.llvm.org)
+- [pkg-config 0.29+](https://www.freedesktop.org/wiki/Software/pkg-config/)
+- [bdwgc/libgc 8.0+](https://www.hboehm.info/gc/)
+- [cJSON 1.7+](https://github.com/DaveGamble/cJSON) (optional, for [`github.com/goplus/llgo/c/cjson`](https://pkg.go.dev/github.com/goplus/llgo/c/cjson))
+- [SQLite 3](https://www.sqlite.org) (optional, for [`github.com/goplus/llgo/c/sqlite`](https://pkg.go.dev/github.com/goplus/llgo/c/sqlite))
+- [Python 3.11+](https://www.python.org) (optional, for [`github.com/goplus/llgo/py`](https://pkg.go.dev/github.com/goplus/llgo/py))
+
 ## How to install
 
 Follow these steps to generate the `llgo` command (its usage is the same as the `go` command):
@@ -219,8 +231,10 @@ Follow these steps to generate the `llgo` command (its usage is the same as the
 
 ```sh
 brew update # execute if needed
-brew install llvm@17 libgc
+brew install llvm@17 pkg-config libgc
+brew install cjson sqlite python@3.12 # optional
 export PATH=$(brew --prefix llvm@17)/bin:$PATH # you may want to add this to your shell RC file, e.g. ~/.zshrc
+export CC=clang CXX=clang++ # only for go build; optional if you have other compatible compilers
 go install -v ./...
 ```
 
@@ -230,8 +244,10 @@ go install -v ./...
 echo "deb http://apt.llvm.org/$(lsb_release -cs)/ llvm-toolchain-$(lsb_release -cs)-17 main" | sudo tee /etc/apt/sources.list.d/llvm.list
 wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
 sudo apt-get update # execute if needed
-sudo apt-get install -y --no-install-recommends llvm-17-dev clang-17 lld-17 libgc-dev
+sudo apt-get install -y llvm-17-dev clang-17 lld-17 pkg-config libgc-dev
+sudo apt-get install -y libcjson-dev libsqlite3-dev python3.12-dev # optional
 export PATH=/usr/lib/llvm-17/bin:$PATH # you may want to add this to your shell RC file, e.g. ~/.bashrc
+export CC=clang CXX=clang++ # only for go build; optional if you have other compatible compilers
 go install -v ./...
 ```
 
@@ -251,6 +267,7 @@ TODO
 How do I generate these tools?
 
 ```sh
+export CC=clang CXX=clang++ # only for go build; optional if you have other compatible compilers
 go install -v ./...  # compile all tools except pydump
 cd chore/_xtool
 llgo install ./...   # compile pydump