diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 10db61ea..2d1ff811 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -7,6 +7,9 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
+    # Forced to run on debian:buster since debian:bullseye's Boost is not
+    # functional to compile executables statically WITH bz2 and lzma.
+    container: debian:buster
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
@@ -14,12 +17,15 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y build-essential cmake libboost-all-dev liblzma-dev
+          # Only because we are running on debian:buster
+          sudo apt-get install -y zlib1g-dev libbz2-dev
       - name: Build innoextract
         run: |
           mkdir -p build 
           cd build
-          cmake ..
+          cmake -DUSE_STATIC_LIBS=ON ..
           make
+          strip innoextract
       - name: Archive artifacts
         uses: actions/upload-artifact@v4
         with:
diff --git a/src/stream/slice.cpp b/src/stream/slice.cpp
index 9a76f30d..0e3f402e 100644
--- a/src/stream/slice.cpp
+++ b/src/stream/slice.cpp
@@ -27,7 +27,10 @@
 #include <boost/cstdint.hpp>
 #include <boost/algorithm/string/predicate.hpp>
 #include <boost/filesystem/operations.hpp>
-#include <boost/filesystem/directory.hpp>
+// Debian Buster has Boost Filesystem 1.67.0.1 installed by default
+// directory.hpp was split from the main in 1.72
+// https://www.boost.org/users/history/version_1_72_0.html
+// #include <boost/filesystem/directory.hpp>
 
 #include "util/console.hpp"
 #include "util/load.hpp"
diff --git a/src/util/encoding.cpp b/src/util/encoding.cpp
index 3cb88be8..39fc7b56 100644
--- a/src/util/encoding.cpp
+++ b/src/util/encoding.cpp
@@ -72,6 +72,7 @@
 
 #include "util/log.hpp"
 #include "util/math.hpp"
+#include <unordered_map>
 
 namespace util {