diff --git a/.env b/.env
new file mode 100644
index 0000000..e09c958
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+SDK=0.2.4-alpine-3.19.1
\ No newline at end of file
diff --git a/.github/workflows/build-check-sdk.yaml b/.github/workflows/build-check-sdk.yaml
index b17b734..d71dcf8 100644
--- a/.github/workflows/build-check-sdk.yaml
+++ b/.github/workflows/build-check-sdk.yaml
@@ -1,14 +1,14 @@
 name: "Build check gemstone in SDK"
 run-name: SDK build check to ${{ inputs.deploy_target }} by @${{ github.actor }}
 on: [push, pull_request]
-env:
-  SDK: 0.2.3-alpine-3.19.1
 jobs:
   build-check-sdk:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+    - name: Setup repository
+      run: git submodule init && git submodule update
     - name: Setup SDK
-      run: docker pull servostar/gemstone:sdk-"$SDK" && docker build --tag gemstone:devkit-"$SDK" .
+      run:  source ./.env && docker pull servostar/gemstone:sdk-"$SDK"
     - name: Compile
-      run: docker run gemstone:devkit-"$SDK" sh run-check-test.sh
+      run: set -a && source ./.env && sh run-docker-build.sh
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 74d1733..2dad620 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,8 @@ cmake_minimum_required(VERSION 3.15...3.25)
 # Header must be included this way: #include <module/header.h>
 #
 # ├─ res
+# ├─ dep
+# │  └─ klib
 # ├─ src
 # │  ├─ lex
 # │  │  └─ lexer.l
@@ -68,6 +70,13 @@ add_custom_command(OUTPUT ${YACC_GENERATED_SOURCE_FILE}
         COMMENT "generate C source file for parser"
         VERBATIM)
 
+# ------------------------------------------------ #
+# Setup Glib 2.0                                   #
+# ------------------------------------------------ #
+
+find_package(PkgConfig REQUIRED)
+pkg_search_module(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+    
 # ------------------------------------------------ #
 #  LLVM backend                                    #
 # ------------------------------------------------ #
@@ -84,13 +93,16 @@ link_libraries(${LLVM_LIBS})
 #  Source                                          #
 # ------------------------------------------------ #
 
+include_directories(${PROJECT_SOURCE_DIR}/src)
+include_directories(PRIVATE ${GLIB_INCLUDE_DIRS})
+
 file(GLOB_RECURSE SOURCE_FILES src/*.c)
 
 # define default compile flags
 if (MSVC)
     set(FLAGS /Wall /W3 /permissive)
 else()
-    set(FLAGS -Wall -Wextra -Wconversion -Wpedantic)
+    set(FLAGS -Wall -Wextra -Wpedantic)
 endif()
 
 # ------------------------------------------------ #
@@ -107,6 +119,8 @@ set_target_properties(release
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/release)
 
+target_link_libraries(release PkgConfig::GLIB)
+
 # FIXME: cannot compile with /O2 because of /RTC1 flag
 if (MSVC)
     set(RELEASE_FLAGS)
@@ -139,6 +153,8 @@ set_target_properties(debug
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/debug)
 
+target_link_libraries(debug PkgConfig::GLIB)
+
 if (MSVC)
     set(DEBUG_FLAGS /DEBUG)
 else()
@@ -168,6 +184,8 @@ set_target_properties(check
         OUTPUT_NAME "gsc"
         RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/check)
 
+target_link_libraries(check PkgConfig::GLIB)
+
 if (MSVC)
     set(CHECK_FLAGS /DEBUG /WX)
 else()
diff --git a/Dockerfile b/Dockerfile
index a8c2f7f..68265d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-FROM servostar/gemstone:sdk-0.2.3-alpine-3.19.1
+FROM servostar/gemstone:sdk-0.2.4-alpine-3.19.1
 LABEL authors="servostar"
-LABEL version="0.2.3"
+LABEL version="0.2.4"
 LABEL description="docker image for setting up the build pipeline on SDK"
 LABEL website="https://github.com/Servostar/gemstone"
 
@@ -8,5 +8,7 @@ COPY --chown=lorang src /home/lorang/src
 COPY --chown=lorang tests /home/lorang/tests
 COPY --chown=lorang CMakeLists.txt /home/lorang/
 COPY --chown=lorang run-check-test.sh /home/lorang/
+COPY --chown=lorang .env /home/lorang/
+COPY --chown=lorang run-docker-build.sh /home/lorang/
 
 RUN cmake .
diff --git a/run-check-test.sh b/run-check-test.sh
index a2a3ab4..bd7e5cc 100644
--- a/run-check-test.sh
+++ b/run-check-test.sh
@@ -9,6 +9,8 @@ echo "+--------------------------------------+"
 echo "| BUILDING all TARGETS                 |"
 echo "+--------------------------------------+"
 
+cmake .
+
 make -B
 if [ ! $? -eq 0 ]; then
   echo "===> failed to build targets"
diff --git a/run-docker-build.sh b/run-docker-build.sh
new file mode 100755
index 0000000..aaec9c6
--- /dev/null
+++ b/run-docker-build.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env sh
+
+# Author: Sven Vogel
+# Created: 17.05.2024
+# Description: Builds the Dockerfile for SDK and DEVKIT
+
+echo "+--------------------------------------+"
+echo "| CHECKING prelude                     |"
+echo "+--------------------------------------+"
+
+if [ -z "$SDK" ]; then
+  echo "no SDK specified, sourcing .env"
+  source ./.env
+
+  if [ -z "$SDK" ]; then
+    echo "no SDK specified"
+    exit 1
+  else
+    echo "using SDK $SDK"
+  fi
+
+else
+  echo "using SDK $SDK"
+fi
+
+echo "+--------------------------------------+"
+echo "| BUILDING SDK                         |"
+echo "+--------------------------------------+"
+
+docker build --tag servostar/gemstone:sdk-"$SDK" sdk/.
+if [ ! $? -eq 0 ]; then
+  echo "===> failed to build sdk"
+  exit 1
+fi
+
+echo "+--------------------------------------+"
+echo "| BUILDING DEVKIT                      |"
+echo "+--------------------------------------+"
+
+docker build --tag servostar/gemstone:devkit-"$SDK" .
+if [ ! $? -eq 0 ]; then
+  echo "===> failed to build devkit"
+  exit 1
+fi
+
+echo "+--------------------------------------+"
+echo "| RUNNING check test                   |"
+echo "+--------------------------------------+"
+
+docker run servostar/gemstone:devkit-"$SDK" sh run-check-test.sh
+if [ ! $? -eq 0 ]; then
+  echo "===> failed to run build or checks"
+  exit 1
+fi
+
+echo "+--------------------------------------+"
+echo "| DONE                                 |"
+echo "+--------------------------------------+"
diff --git a/sdk/Dockerfile b/sdk/Dockerfile
index aae7438..b5523b3 100644
--- a/sdk/Dockerfile
+++ b/sdk/Dockerfile
@@ -1,11 +1,11 @@
 FROM alpine:3.19.1
 LABEL authors="servostar"
-LABEL version="0.2.3"
+LABEL version="0.2.4"
 LABEL description="base image for building the gemstone programming language compiler"
 LABEL website="https://github.com/Servostar/gemstone"
 
 # install dependencies
-RUN apk add build-base gcc make cmake bison flex git python3 graphviz
+RUN apk add build-base gcc make cmake bison flex git python3 graphviz glib glib-dev
 
 # create user for build
 RUN adduser --disabled-password lorang
diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index b5c1111..1228d2b 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -8,4 +8,5 @@ set(CTEST_BINARY_DIRECTORY ${PROJECT_BINARY_DIR}/tests)
 
 add_subdirectory(logging)
 add_subdirectory(input_file)
-add_subdirectory(ast)
\ No newline at end of file
+add_subdirectory(ast)
+add_subdirectory(glib)
\ No newline at end of file
diff --git a/tests/glib/CMakeLists.txt b/tests/glib/CMakeLists.txt
new file mode 100644
index 0000000..e3ede27
--- /dev/null
+++ b/tests/glib/CMakeLists.txt
@@ -0,0 +1,22 @@
+include(CTest)
+
+include_directories(${PROJECT_SOURCE_DIR}/src)
+include_directories(PRIVATE ${GLIB_INCLUDE_DIRS})
+
+find_package(PkgConfig REQUIRED)
+pkg_search_module(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+
+# ------------------------------------------------------- #
+# CTEST 1
+# test Glib's hashmap
+
+add_executable(glib_hashmap
+        glib_hashmap.c)
+set_target_properties(glib_hashmap
+        PROPERTIES
+        OUTPUT_NAME "glib_hashmap"
+        RUNTIME_OUTPUT_DIRECTORY ${GEMSTONE_BINARY_DIR}/tests/glib)
+target_link_libraries(glib_hashmap PkgConfig::GLIB)
+add_test(NAME glib_hashmap
+        WORKING_DIRECTORY ${PROJECT_SOURCE_DIR}
+        COMMAND ${GEMSTONE_BINARY_DIR}/tests/glib/glib_hashmap)
diff --git a/tests/glib/glib_hashmap.c b/tests/glib/glib_hashmap.c
new file mode 100644
index 0000000..116df77
--- /dev/null
+++ b/tests/glib/glib_hashmap.c
@@ -0,0 +1,27 @@
+
+#include <glib.h>
+
+int main(int argc, char* argv[]) {
+
+    GHashTable* map = g_hash_table_new(g_str_hash, g_str_equal);
+
+    for (int i = 0; i < argc; i++) {
+        int* index = malloc(sizeof(int));
+
+        *index = i;
+
+        g_hash_table_insert(map, argv[i], index);
+    }
+
+    for (int i = 0; i < argc; i++) {
+        int* index = (int*) g_hash_table_lookup(map, argv[i]);
+
+        g_hash_table_remove(map, argv[i]);
+
+        free(index);
+    }
+
+    g_hash_table_destroy(map);
+
+    return 0;
+}