diff --git a/kotlin-native/konan/konan.properties b/kotlin-native/konan/konan.properties
index b7954475309..c2419bc6a2f 100644
--- a/kotlin-native/konan/konan.properties
+++ b/kotlin-native/konan/konan.properties
@@ -408,22 +408,22 @@ runtimeDefinitions.watchos_x64 = KONAN_OBJC_INTEROP=1 KONAN_WATCHOS=1 \
 llvmHome.linux_x64 = $llvm.linux_x64.dev
 libffiDir.linux_x64 = libffi-3.2.1-2-linux-x86-64
 
-gccToolchain.linux_x64 = x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9
+gccToolchain.linux_x64 = x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 targetToolchain.linux_x64 = $gccToolchain.linux_x64/x86_64-unknown-linux-gnu
 dependencies.linux_x64 = \
-    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-2-linux-x86-64 \
     lldb-3-linux
 
 targetToolchain.mingw_x64-linux_x64 = msys2-mingw-w64-x86_64-clang-llvm-lld-compiler_rt-8.0.1
 dependencies.mingw_x64-linux_x64 = \
     libffi-3.2.1-mingw-w64-x86-64 \
-    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9
+    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 
 targetToolchain.macos_x64-linux_x64 = $llvmHome.macos_x64
 dependencies.macos_x64-linux_x64 = \
     libffi-3.2.1-3-darwin-macos \
-    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9
+    x86_64-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 
 quadruple.linux_x64 = x86_64-unknown-linux-gnu
 targetSysRoot.linux_x64 = $gccToolchain.linux_x64/x86_64-unknown-linux-gnu/sysroot
@@ -459,7 +459,7 @@ runtimeDefinitions.linux_x64 = USE_GCC_UNWIND=1 KONAN_LINUX=1 KONAN_X64=1 \
   USE_ELF_SYMBOLS=1 ELFSIZE=64
 
 # Raspberry Pi
-gccToolchain.linux_arm32_hfp = arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9
+gccToolchain.linux_arm32_hfp = arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 
 targetToolchain.linux_x64-linux_arm32_hfp = $gccToolchain.linux_arm32_hfp/arm-unknown-linux-gnueabihf
 targetToolchain.mingw_x64-linux_arm32_hfp = msys2-mingw-w64-x86_64-clang-llvm-lld-compiler_rt-8.0.1
@@ -470,13 +470,13 @@ emulatorDependency.linux_x64-linux_arm32_hfp = qemu-arm-static-5.1.0-linux-2
 emulatorExecutable.linux_x64-linux_arm32_hfp = qemu-arm-static-5.1.0-linux-2/qemu-arm
 
 dependencies.linux_x64-linux_arm32_hfp = \
-    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-2-linux-x86-64
 dependencies.mingw_x64-linux_arm32_hfp = \
-    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-mingw-w64-x86-64
 dependencies.macos_x64-linux_arm32_hfp = \
-    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    arm-unknown-linux-gnueabihf-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-3-darwin-macos
 
 quadruple.linux_arm32_hfp = arm-unknown-linux-gnueabihf
@@ -513,7 +513,7 @@ runtimeDefinitions.linux_arm32_hfp = USE_GCC_UNWIND=1 KONAN_LINUX=1 \
   KONAN_ARM32=1 USE_ELF_SYMBOLS=1 ELFSIZE=32 KONAN_NO_UNALIGNED_ACCESS=1
 
 # Linux arm64
-gccToolchain.linux_arm64 = aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9
+gccToolchain.linux_arm64 = aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9-2
 
 targetToolchain.linux_x64-linux_arm64 = $gccToolchain.linux_arm64/aarch64-unknown-linux-gnu
 targetToolchain.mingw_x64-linux_arm64 = msys2-mingw-w64-x86_64-clang-llvm-lld-compiler_rt-8.0.1
@@ -523,13 +523,13 @@ emulatorDependency.linux_x64-linux_arm64 = qemu-aarch64-static-5.1.0-linux-2
 emulatorExecutable.linux_x64-linux_arm64 = qemu-aarch64-static-5.1.0-linux-2/qemu-aarch64
 
 dependencies.linux_x64-linux_arm64 = \
-    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9 \
+    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9-2 \
     libffi-3.2.1-2-linux-x86-64
 dependencies.mingw_x64-linux_arm64 = \
-    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9 \
+    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9-2 \
     libffi-3.2.1-mingw-w64-x86-64
 dependencies.macos_x64-linux_arm64 = \
-    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9 \
+    aarch64-unknown-linux-gnu-gcc-8.3.0-glibc-2.25-kernel-4.9-2 \
     libffi-3.2.1-3-darwin-macos
 
 quadruple.linux_arm64 = aarch64-unknown-linux-gnu
@@ -565,14 +565,14 @@ runtimeDefinitions.linux_arm64 = USE_GCC_UNWIND=1 KONAN_LINUX=1 KONAN_ARM64=1 \
   USE_ELF_SYMBOLS=1 ELFSIZE=64
 
 # MIPS
-gccToolchain.linux_mips32 = mips-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9
+gccToolchain.linux_mips32 = mips-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 
 targetToolchain.linux_x64-linux_mips32 = $gccToolchain.linux_mips32/mips-unknown-linux-gnu
 
 emulatorDependency.linux_x64-linux_mips32 = qemu-mips-static-5.1.0-linux-2
 emulatorExecutable.linux_x64-linux_mips32 = qemu-mips-static-5.1.0-linux-2/qemu-mips
 dependencies.linux_x64-linux_mips32 = \
-    mips-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    mips-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-2-linux-x86-64
 
 quadruple.linux_mips32 = mips-unknown-linux-gnu
@@ -607,14 +607,14 @@ runtimeDefinitions.linux_mips32 = USE_GCC_UNWIND=1 KONAN_LINUX=1 KONAN_MIPS32=1
   USE_ELF_SYMBOLS=1 ELFSIZE=32 KONAN_NO_64BIT_ATOMIC=1 KONAN_NO_UNALIGNED_ACCESS=1
 
 # MIPSel
-gccToolchain.linux_mipsel32 = mipsel-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9
+gccToolchain.linux_mipsel32 = mipsel-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2
 
 targetToolchain.linux_x64-linux_mipsel32 = $gccToolchain.linux_mipsel32/mipsel-unknown-linux-gnu
 
 emulatorDependency.linux_x64-linux_mipsel32 = qemu-mipsel-static-5.1.0-linux-2
 emulatorExecutable.linux_x64-linux_mipsel32 = qemu-mipsel-static-5.1.0-linux-2/qemu-mipsel
 dependencies.linux_x64-linux_mipsel32 = \
-    mipsel-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9 \
+    mipsel-unknown-linux-gnu-gcc-8.3.0-glibc-2.19-kernel-4.9-2 \
     libffi-3.2.1-2-linux-x86-64
 
 quadruple.linux_mipsel32 = mipsel-unknown-linux-gnu
diff --git a/kotlin-native/tools/toolchain_builder/Dockerfile b/kotlin-native/tools/toolchain_builder/Dockerfile
index 8bb3e5c2030..2db24b99036 100644
--- a/kotlin-native/tools/toolchain_builder/Dockerfile
+++ b/kotlin-native/tools/toolchain_builder/Dockerfile
@@ -1,5 +1,5 @@
 # We might want to switch to alpine, but it is not stable enough yet.
-FROM ubuntu:20.04
+FROM ubuntu:14.04
 
 ENV TZ=Europe/Moscow
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
@@ -7,7 +7,7 @@ RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 # Install crosstool-ng deps.
 RUN apt-get update
 RUN apt-get install -y curl gcc git g++ gperf bison flex texinfo help2man make libncurses5-dev \
-    python3-dev autoconf automake libtool libtool-bin gawk wget bzip2 xz-utils unzip \
+    python3-dev autoconf automake libtool gawk wget bzip2 xz-utils unzip \
     patch libstdc++6 rsync
 
 # Put a fix for strip.