diff --git a/.vscode/settings.json b/.vscode/settings.json
index f7f606b..9b01ed6 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,3 +1,52 @@
 {
-    "deno.enable": true
+    "deno.enable": true,
+    "files.associations": {
+        "array": "cpp",
+        "atomic": "cpp",
+        "bit": "cpp",
+        "*.tcc": "cpp",
+        "cctype": "cpp",
+        "clocale": "cpp",
+        "cmath": "cpp",
+        "compare": "cpp",
+        "concepts": "cpp",
+        "cstdarg": "cpp",
+        "cstddef": "cpp",
+        "cstdint": "cpp",
+        "cstdio": "cpp",
+        "cstdlib": "cpp",
+        "cwchar": "cpp",
+        "cwctype": "cpp",
+        "deque": "cpp",
+        "string": "cpp",
+        "unordered_map": "cpp",
+        "vector": "cpp",
+        "exception": "cpp",
+        "algorithm": "cpp",
+        "functional": "cpp",
+        "iterator": "cpp",
+        "memory": "cpp",
+        "memory_resource": "cpp",
+        "numeric": "cpp",
+        "optional": "cpp",
+        "random": "cpp",
+        "string_view": "cpp",
+        "system_error": "cpp",
+        "tuple": "cpp",
+        "type_traits": "cpp",
+        "utility": "cpp",
+        "fstream": "cpp",
+        "initializer_list": "cpp",
+        "iosfwd": "cpp",
+        "iostream": "cpp",
+        "istream": "cpp",
+        "limits": "cpp",
+        "new": "cpp",
+        "numbers": "cpp",
+        "ostream": "cpp",
+        "stdexcept": "cpp",
+        "streambuf": "cpp",
+        "typeinfo": "cpp",
+        "variant": "cpp"
+    }
 }
diff --git a/compiler/checker.ts b/compiler/checker.ts
index 1eb4df3..8fcea55 100644
--- a/compiler/checker.ts
+++ b/compiler/checker.ts
@@ -362,7 +362,6 @@ export class Checker {
         }
         const pos = expr.pos;
         const subject = this.checkExpr(expr.kind.subject);
-        console.log(expr);
         if (subject.type !== "fn") {
             this.report("cannot call non-fn", pos);
             return { type: "error" };
diff --git a/compiler/main.ts b/compiler/main.ts
index 0884103..52c706b 100644
--- a/compiler/main.ts
+++ b/compiler/main.ts
@@ -30,6 +30,6 @@ lowerer.lower(ast);
 lowerer.printProgram();
 const program = lowerer.finish();
 //console.log(JSON.stringify(program, null, 4));
-console.log(JSON.stringify(program));
+// console.log(JSON.stringify(program));
 
 await Deno.writeTextFile("out.slgbc", JSON.stringify(program));
diff --git a/compiler/parser.ts b/compiler/parser.ts
index 6cccd47..0be79c1 100644
--- a/compiler/parser.ts
+++ b/compiler/parser.ts
@@ -42,7 +42,6 @@ export class Parser {
     }
 
     private report(msg: string, pos = this.pos()) {
-        console.log(`Parser: ${msg} at ${pos.line}:${pos.col}`);
         this.reporter.reportError({
             msg,
             pos,
diff --git a/runtime/Dockerfile b/runtime/Dockerfile
new file mode 100644
index 0000000..970b425
--- /dev/null
+++ b/runtime/Dockerfile
@@ -0,0 +1,9 @@
+from gcc
+
+WORKDIR /workdir
+
+COPY . .
+
+RUN make -j 8
+
+ENTRYPOINT [ "./build/sliger", "run", "out.slgbc" ]
\ No newline at end of file
diff --git a/runtime/Makefile b/runtime/Makefile
index 6be4c0c..c4e80d3 100644
--- a/runtime/Makefile
+++ b/runtime/Makefile
@@ -14,16 +14,18 @@ CXX_SOURCES = $(shell find . -name "*.cpp" -type f -printf '%P\n')
 
 CXX_OBJECTS = $(patsubst %.cpp,build/%.o,$(CXX_SOURCES))
 
+CXX = g++
+
 all: build_dir $(OUT)
 
 $(OUT): $(CXX_OBJECTS)
-	g++ -o $@ $(CXX_FLAGS) $^
+	$(CXX) -o $@ $(CXX_FLAGS) $^
 
 build_dir:
 	mkdir -p build/
 
 build/%.o: %.cpp $(CXX_HEADERS)
-	g++ -c -o $@ $(CXX_FLAGS) $<
+	$(CXX) -c -o $@ $(CXX_FLAGS) $<
 
 clean:
 	rm -rf build/
diff --git a/runtime/main.cpp b/runtime/main.cpp
index 34ffb52..65409ce 100644
--- a/runtime/main.cpp
+++ b/runtime/main.cpp
@@ -9,6 +9,8 @@
 #include <string>
 #include <vector>
 
+bool print_stack_debug = false;
+
 int execute_file_and_exit(std::string filename)
 {
     auto file = std::ifstream();
@@ -33,6 +35,7 @@ int execute_file_and_exit(std::string filename)
         {
             .flame_graph = false,
             .code_coverage = false,
+            .print_stack_debug = print_stack_debug,
         });
     vm.run_until_done();
     return 0;
diff --git a/runtime/vm.cpp b/runtime/vm.cpp
index 4d1ba95..489c9db 100644
--- a/runtime/vm.cpp
+++ b/runtime/vm.cpp
@@ -68,8 +68,10 @@ void VM::run_n_instructions(size_t amount)
 
 void VM::run_instruction()
 {
-    // std::cout << std::format("    {:>4}: {:<12}{}\n", this->pc,
-    //     maybe_op_to_string(this->program[this->pc]), stack_repr_string(8));
+    if (this->opts.print_stack_debug) {
+        std::cout << std::format("    {:>4}: {:<12}{}\n", this->pc,
+            maybe_op_to_string(this->program[this->pc]), stack_repr_string(8));
+    }
     auto op = eat_op();
     switch (op) {
         case Op::Nop:
@@ -343,6 +345,7 @@ void VM::run_builtin(Builtin builtin_id)
             assert_stack_has(1);
             auto message = stack_pop().as_string().value;
             std::cout << message;
+            stack_push(Null());
             break;
         }
     }
diff --git a/runtime/vm.hpp b/runtime/vm.hpp
index c05d4fa..f7ec40e 100644
--- a/runtime/vm.hpp
+++ b/runtime/vm.hpp
@@ -142,6 +142,7 @@ private:
 struct VMOpts {
     bool flame_graph;
     bool code_coverage;
+    bool print_stack_debug;
 };
 
 class VM {
diff --git a/runtime/vm_provider.cpp b/runtime/vm_provider.cpp
index 53ce67b..2c4fa7a 100644
--- a/runtime/vm_provider.cpp
+++ b/runtime/vm_provider.cpp
@@ -9,6 +9,7 @@ auto VmProvider::load_and_run(std::vector<uint32_t> instructions) -> void
         {
             .flame_graph = true,
             .code_coverage = true,
+            .print_stack_debug = false,
         });
     vm.run_until_done();
     this->vm = vm;
diff --git a/slige-run-docker.sh b/slige-run-docker.sh
new file mode 100755
index 0000000..80dbb18
--- /dev/null
+++ b/slige-run-docker.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+
+echo Text:
+cat $1
+
+echo Compiling $1...
+
+deno run --allow-read --allow-write compiler/main.ts $1
+
+echo Running out.slgbc...
+
+cp out.slgbc runtime/
+
+cd runtime/
+
+docker build . -t sliger-buildenv
+docker run --rm -it sliger-buildenv
\ No newline at end of file