diff --git a/CMakeLists.txt b/CMakeLists.txt
index 048be86..62fcda5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,29 +12,17 @@ set(CUSTOM_LIBC_PATH CACHE PATH "")
 set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
 
 include(third-party)
-get_third_party(glog)
 set(WITH_GFLAGS
     OFF
     CACHE INTERNAL "" FORCE)
 set(WITH_UNWIND OFF)
 set(BUILD_SHARED_LIBS OFF)
-add_subdirectory(${CMAKE_CURRENT_BINARY_DIR}/glog
-                 ${CMAKE_CURRENT_BINARY_DIR}/glog EXCLUDE_FROM_ALL)
-include_directories(${CMAKE_CURRENT_BINARY_DIR}/glog
-                    ${CMAKE_CURRENT_BINARY_DIR}/glog/src)
 add_definitions(-DC10_USE_GLOG=1)
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/raw_write)
 
 add_library(tls_secure tls_secure.cc)
 
-add_executable(sloader sloader.cc dyn_loader.cc libc_mapping.cc sloader_dl.cc
-                       utils.cc sloader_static.map)
-target_link_libraries(sloader glog tls_secure)
-target_compile_options(sloader PUBLIC -Wall -Werror)
-target_link_options(sloader PUBLIC -static -Wl,-verbose -T
-                    ${CMAKE_CURRENT_SOURCE_DIR}/sloader_static.map)
-
 if(CUSTOM_LIBC_PATH)
   execute_process(
     COMMAND ${CMAKE_CXX_COMPILER} --print-file-name=crtbegin.o
@@ -49,11 +37,10 @@ if(CUSTOM_LIBC_PATH)
     OUTPUT_VARIABLE LIBSTDCXX
     OUTPUT_STRIP_TRAILING_WHITESPACE)
 
-  add_executable(sloader_custom_libc sloader.cc dyn_loader.cc libc_mapping.cc
-                                     sloader_dl.cc utils.cc sloader_static.map)
+  add_executable(sloader sloader.cc dyn_loader.cc libc_mapping.cc sloader_dl.cc
+                         utils.cc sloader_static.map)
   target_link_libraries(
-    sloader_custom_libc
-    glog
+    sloader
     ${CUSTOM_LIBC_PATH}/lib/crt1.o
     ${CUSTOM_LIBC_PATH}/lib/crti.o
     ${CRT_BEGIN}
@@ -67,9 +54,9 @@ if(CUSTOM_LIBC_PATH)
     ${CRT_END}
     ${CUSTOM_LIBC_PATH}/lib/crtn.o
     tls_secure)
-  target_compile_options(sloader_custom_libc PUBLIC -Wall -Werror)
+  target_compile_options(sloader PUBLIC -Wall -Werror)
   target_link_options(
-    sloader_custom_libc
+    sloader
     BEFORE
     PUBLIC
     -nostdlib
@@ -78,6 +65,13 @@ if(CUSTOM_LIBC_PATH)
     -Wl,-verbose
     -T
     ${CMAKE_CURRENT_SOURCE_DIR}/sloader_static.map)
+else()
+  add_executable(sloader sloader.cc dyn_loader.cc libc_mapping.cc sloader_dl.cc
+                         utils.cc sloader_static.map)
+  target_link_libraries(sloader tls_secure)
+  target_compile_options(sloader PUBLIC -Wall -Werror)
+  target_link_options(sloader PUBLIC -static -Wl,-verbose -T
+                      ${CMAKE_CURRENT_SOURCE_DIR}/sloader_static.map)
 endif()
 
 configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CTestCustom.cmake
diff --git a/debian-Dockerfile b/debian-Dockerfile
index cff7f63..86e8480 100644
--- a/debian-Dockerfile
+++ b/debian-Dockerfile
@@ -1,14 +1,15 @@
 FROM debian:12.2
 ENV DEBIAN_FRONTEND=noninteractive
-RUN apt-get update && apt-get install -y ninja-build cmake gcc g++ git python3 python3-distutils python3-dev python3-pip nasm clang-format libcap-dev tmux zsh neovim
+RUN apt-get update
+RUN apt-get install -y ninja-build cmake gcc g++ git python3 python3-distutils python3-dev python3-pip nasm clang-format libcap-dev tmux zsh neovim ccache gawk bison
 # RUN pip3 install torch==1.13.0+cpu -f https://download.pytorch.org/whl/torch_stable.html
 COPY . /sloader
 WORKDIR /sloader
-# TODO
-# RUN ./run-format.sh
+RUN ./scripts/clone_glibc.sh glibc-2.36
+RUN ./scripts/build_glibc.sh
 RUN rm -rf build
 RUN mkdir build
-RUN cmake -GNinja -S . -B build
-RUN cmake --build build
+RUN cmake -GNinja -S . -B build -DCUSTOM_LIBC_PATH=/sloader/glibc-install
+RUN cmake --build build -j $(nproc)
 RUN cd build && ctest --output-on-failure -j $(nproc)
 RUN ./make-sloader-itself.sh
diff --git a/dyn_loader.cc b/dyn_loader.cc
index 1ba6278..76fa1a4 100644
--- a/dyn_loader.cc
+++ b/dyn_loader.cc
@@ -64,7 +64,8 @@ std::vector<std::filesystem::path> read_ldsoconf() {
 
 ELFBinary::ELFBinary(const std::filesystem::path path) : path_(path) {
     int fd = open(path_.c_str(), O_RDONLY);
-    CHECK(fd >= 0) << path_;
+    LOG(INFO) << LOG_KEY(path_) << LOG_KEY(fd);
+    CHECK(fd >= 0);
 
     size_t size = lseek(fd, 0, SEEK_END);
     CHECK_GT(size, 8UL + 16UL);
@@ -598,6 +599,7 @@ Elf64_Addr DynLoader::TLSSymOffset(const std::string& name) {
         return (reinterpret_cast<const char*>(sloader_dummy_to_secure_tls_space) + 4096 - addr);
     }
     LOG(FATAL) << "Cannot find " << name;
+    std::abort();
 }
 
 void DynLoader::Relocate() {
@@ -703,6 +705,7 @@ void DynLoader::Relocate() {
                         size = sym.st_size;
                     } else {
                         LOG(FATAL) << "Cannot find " << name;
+                        std::abort();
                         break;
                     }
                     void* dest = reinterpret_cast<void*>(bin.base_addr() + r.r_offset);
diff --git a/misc/build_glibc.sh b/misc/build_glibc.sh
deleted file mode 100755
index 6163a96..0000000
--- a/misc/build_glibc.sh
+++ /dev/null
@@ -1,5 +0,0 @@
-#! /bin/bash -eux
-
-cd $(git rev-parse --show-toplevel)/glibc-build
-LD_LIBRARY_PATH="" bear -- make all -j 20
-LD_LIBRARY_PATH="" bear -- make install -j 20
diff --git a/scripts/build_glibc.sh b/scripts/build_glibc.sh
new file mode 100755
index 0000000..4d7a786
--- /dev/null
+++ b/scripts/build_glibc.sh
@@ -0,0 +1,10 @@
+#! /bin/bash -eux
+
+cd $(git rev-parse --show-toplevel)/glibc-build
+if which bear; then
+    LD_LIBRARY_PATH="" bear -- make all -j 20
+    LD_LIBRARY_PATH="" bear -- make install -j 20
+else
+    LD_LIBRARY_PATH="" make all -j $(nproc)
+    LD_LIBRARY_PATH="" make install -j $(nproc)
+fi
diff --git a/misc/clone_glibc.sh b/scripts/clone_glibc.sh
similarity index 66%
rename from misc/clone_glibc.sh
rename to scripts/clone_glibc.sh
index b3d457a..d96d6a6 100755
--- a/misc/clone_glibc.sh
+++ b/scripts/clone_glibc.sh
@@ -2,14 +2,21 @@
 
 cd $(git rev-parse --show-toplevel)
 
+if [[ $# -ne 1 ]]
+then
+    echo "Usage: $0 <glibc-version>"
+    exit 1
+fi
+GLIBC_VERSION=$1
+
 if [[ ! -d glibc ]]
 then
-    git clone git@github.com:akawashiro/glibc.git
+    git clone --depth 1 --no-single-branch https://github.com/akawashiro/glibc.git
     
     pushd glibc
     git remote add upstream https://sourceware.org/git/glibc.git
     git fetch --all
-    git checkout glibc-2.35
+    git checkout ${GLIBC_VERSION}
     popd
 fi
 
diff --git a/sloader.cc b/sloader.cc
index 0b1026f..05ecffb 100644
--- a/sloader.cc
+++ b/sloader.cc
@@ -30,15 +30,14 @@ Elf64_Half GetEType(const std::filesystem::path& filepath) {
     size_t mapped_size = (size + 0xfff) & ~0xfff;
 
     char* p = (char*)mmap(NULL, mapped_size, PROT_READ | PROT_WRITE | PROT_EXEC, MAP_PRIVATE, fd, 0);
-    CHECK(p != MAP_FAILED) << LOG_BITS(mapped_size) << LOG_BITS(size) << LOG_KEY(filepath);
+    LOG(FATAL) << LOG_BITS(mapped_size) << LOG_BITS(size) << LOG_KEY(filepath);
+    CHECK(p != MAP_FAILED);
 
     Elf64_Ehdr* ehdr = reinterpret_cast<Elf64_Ehdr*>(p);
     return ehdr->e_type;
 }
 
 int main(int argc, char* const argv[], char** envp) {
-    google::InitGoogleLogging(argv[0]);
-
     std::string argv0 = argv[1];
     std::filesystem::path fullpath;
 
@@ -56,7 +55,7 @@ int main(int argc, char* const argv[], char** envp) {
     }
 
     LOG(INFO) << LOG_KEY(fullpath);
-    CHECK(std::filesystem::exists(fullpath)) << fullpath;
+    CHECK(std::filesystem::exists(fullpath));
 
     std::vector<std::string> args;
     for (int i = 1; i < argc; i++) {
@@ -74,5 +73,6 @@ int main(int argc, char* const argv[], char** envp) {
         GetDynLoader()->Run();
     } else {
         LOG(FATAL) << "Unsupported etype = " << LOG_KEY(etype);
+        std::abort();
     }
 }
diff --git a/utils.cc b/utils.cc
index bf58643..657a749 100644
--- a/utils.cc
+++ b/utils.cc
@@ -133,8 +133,6 @@ std::string ShowSTB(unsigned char bind) {
             return "STB_HIPROC";
         default: {
             return std::to_string(bind);
-            // LOG(FATAL) << LOG_KEY(bind);
-            // std::abort();
         }
     }
 }
diff --git a/utils.h b/utils.h
index 26ab2d2..363f677 100644
--- a/utils.h
+++ b/utils.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include <elf.h>
-#include <glog/logging.h>
 
 #include <fstream>
 #include <iomanip>
@@ -9,6 +8,28 @@
 #include <sstream>
 #include <vector>
 
+class nullstream : public std::ostream {
+public:
+    nullstream() : std::ostream(nullptr) {}
+};
+inline nullstream null;
+
+#define CHECK(x)                                          \
+    if (!(x)) {                                           \
+        std::cerr << "CHECK failed: " << #x << std::endl; \
+        exit(1);                                          \
+    }
+#define CHECK_GT(x, y) CHECK((x) > (y))
+#define CHECK_LT(x, y) CHECK((x) < (y))
+#define CHECK_EQ(x, y) CHECK((x) == (y))
+#define CHECK_NE(x, y) CHECK((x) != (y))
+#define CHECK_GE(x, y) CHECK((x) >= (y))
+#define CHECK_LE(x, y) CHECK((x) <= (y))
+/* Replace null with std::cout to enable logging */
+#define LOG(loglevel)                                                   \
+    null << #loglevel << " " << __FILE__ << ":" << __LINE__ << " " \
+              << " "
+
 #define LOG_KEY_VALUE(key, value) " " << key << "=" << value
 #define LOG_KEY(key) LOG_KEY_VALUE(#key, key)
 #define LOG_64BITS(key) LOG_KEY_VALUE(#key, HexString(key, 16))