diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 25e42eab..a6d7250a 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -3,7 +3,7 @@ stages:
     - test
         
 build-gcc:
-    image: gcc:latest
+    image: laupetin/gcc-9-multilib:latest
     stage: build
     cache:
       paths:
@@ -13,11 +13,14 @@ build-gcc:
       - docker
       - linux
     script:
+        - "echo pwd: $(pwd)"
+        - "echo ls: $(ls)"
+        - "echo ls ci: $(ls ./ci)"
         - "./generate.sh"
-        - "make -C build -j$(nproc) config=release_x86 all"
+        - "./build-linux.sh"
 
 test-gcc:
-    image: gcc:latest
+    image: laupetin/gcc-9-multilib:latest
     stage: test
     cache:
       paths:
@@ -27,8 +30,6 @@ test-gcc:
       - docker
       - linux
     script:
-        - "./generate.sh"
-        - "make -C build -j$(nproc) config=release_x86 ObjCommonTests ZoneCodeGeneratorLibTests ZoneCommonTests"
         - "./build/lib/Release_x86/tests/ObjCommonTests"
         - "./build/lib/Release_x86/tests/ZoneCodeGeneratorLibTests"
         - "./build/lib/Release_x86/tests/ZoneCommonTests"
diff --git a/build-linux.sh b/build-linux.sh
index 4f689813..d83828fe 100755
--- a/build-linux.sh
+++ b/build-linux.sh
@@ -1,3 +1,6 @@
 #!/bin/bash
 
+# Go to repository root
+cd "$(dirname "$0")" || exit 2
+
 make -C build -j$(nproc) config=release_x86 all
\ No newline at end of file
diff --git a/ci/Dockerfile b/ci/Dockerfile
new file mode 100644
index 00000000..ffe65afb
--- /dev/null
+++ b/ci/Dockerfile
@@ -0,0 +1,6 @@
+FROM ubuntu:focal
+
+RUN /bin/sh -c "dpkg --add-architecture i386"
+RUN /bin/sh -c "apt-get update && apt-get upgrade -y && apt-get install -y git make g++ gcc-9 g++-9 gcc-9-multilib g++-9-multilib"
+
+CMD ["/bin/bash"]
\ No newline at end of file
diff --git a/ci/create-image.sh b/ci/create-image.sh
new file mode 100755
index 00000000..2837b72b
--- /dev/null
+++ b/ci/create-image.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Go to repository root
+cd "$(dirname "$0")" || exit 2
+
+docker build -t oat .
\ No newline at end of file
diff --git a/ci/scripts/build.sh b/ci/scripts/build.sh
new file mode 100755
index 00000000..d42648c4
--- /dev/null
+++ b/ci/scripts/build.sh
@@ -0,0 +1,6 @@
+#!/bin/sh
+
+# Go to repository root
+cd "$(dirname "$0")/../.." || exit 2
+
+docker run --rm -v "$(pwd):/mnt/oat" oat /bin/bash -c "/mnt/oat/generate.sh && /mnt/oat/build-linux.sh"
\ No newline at end of file
diff --git a/ci/scripts/test.sh b/ci/scripts/test.sh
new file mode 100755
index 00000000..50e6fb54
--- /dev/null
+++ b/ci/scripts/test.sh
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+# Go to repository root
+cd "$(dirname "$0")/../../build/lib" || exit 2
+
+./Release_x86/tests/ObjCommonTests
+./Release_x86/tests/ZoneCodeGeneratorLibTests
+./Release_x86/tests/ZoneCommonTests
\ No newline at end of file
diff --git a/generate.sh b/generate.sh
index 19f533e4..ffb1e39b 100755
--- a/generate.sh
+++ b/generate.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
 
+# Go to repository root
+cd "$(dirname "$0")" || exit 2
+
 git submodule update --init --recursive
 tools/premake5 gmake2
\ No newline at end of file