diff --git a/.gitignore b/.gitignore
index 9af4330..8b815eb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .vscode
 build/
-.cache/
\ No newline at end of file
+.cache/
+.direnv/
diff --git a/README.md b/README.md
index ce14c18..eb75b03 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,15 @@
 2. `cmakeConfigurePhase`
 3. `buildPhase`
 4. `./src/tutorial_kirigami2`
+
+For use gammaray, you need to disable yama security.
+
+```
+echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
+```
+
+Then run with,
+
+```
+gammaray ./src/tutorial_kirigami2
+```
diff --git a/flake.nix b/flake.nix
index 1487543..15fcb2c 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,6 +22,11 @@
               pkgs.ninja
               pkgs.cmake
               pkgs.gcc
+
+              # Not required at compile time
+              pkgs.gammaray
+              pkgs.gdb # Required for gammaray
+              pkgs.lldb # Required for gammaray
             ];
 
             dontFixCmake = true;