diff --git a/configs/aarch64-zephyr-elf.config b/configs/aarch64-zephyr-elf.config
index 495960ac..3567ac1e 100644
--- a/configs/aarch64-zephyr-elf.config
+++ b/configs/aarch64-zephyr-elf.config
@@ -60,3 +60,9 @@ CT_LIBC_NEWLIB_NANO_ENABLE_TARGET_OPTSPACE=y
 # CT_LIBC_NEWLIB_NANO_LTO is not set
 CT_LIBC_NEWLIB_NANO_NANO_MALLOC=y
 CT_LIBC_NEWLIB_NANO_NANO_FORMATTED_IO=y
+CT_COMP_LIBS_PICOLIBC=y
+CT_LIBC_PICOLIBC_SRC_CUSTOM=y
+CT_LIBC_PICOLIBC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/picolibc"
+CT_LIBC_PICOLIBC_GLOBAL_ATEXIT=y
+CT_LIBC_PICOLIBC_EXTRA_SECTIONS=y
+CT_TARGET_CFLAGS="-ftls-model=local-exec"
diff --git a/configs/arc-zephyr-elf.config b/configs/arc-zephyr-elf.config
index 01a21cab..c1bf67c0 100644
--- a/configs/arc-zephyr-elf.config
+++ b/configs/arc-zephyr-elf.config
@@ -59,3 +59,8 @@ CT_LIBC_NEWLIB_NANO_ENABLE_TARGET_OPTSPACE=y
 # CT_LIBC_NEWLIB_NANO_LTO is not set
 CT_LIBC_NEWLIB_NANO_NANO_MALLOC=y
 CT_LIBC_NEWLIB_NANO_NANO_FORMATTED_IO=y
+CT_COMP_LIBS_PICOLIBC=y
+CT_LIBC_PICOLIBC_SRC_CUSTOM=y
+CT_LIBC_PICOLIBC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/picolibc"
+CT_LIBC_PICOLIBC_GLOBAL_ATEXIT=y
+CT_LIBC_PICOLIBC_EXTRA_SECTIONS=y
diff --git a/configs/arm-zephyr-eabi.config b/configs/arm-zephyr-eabi.config
index 1652457e..ca761e9f 100644
--- a/configs/arm-zephyr-eabi.config
+++ b/configs/arm-zephyr-eabi.config
@@ -61,3 +61,9 @@ CT_LIBC_NEWLIB_NANO_ENABLE_TARGET_OPTSPACE=y
 # CT_LIBC_NEWLIB_NANO_LTO is not set
 CT_LIBC_NEWLIB_NANO_NANO_MALLOC=y
 CT_LIBC_NEWLIB_NANO_NANO_FORMATTED_IO=y
+CT_COMP_LIBS_PICOLIBC=y
+CT_LIBC_PICOLIBC_SRC_CUSTOM=y
+CT_LIBC_PICOLIBC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/picolibc"
+CT_LIBC_PICOLIBC_GLOBAL_ATEXIT=y
+CT_LIBC_PICOLIBC_EXTRA_SECTIONS=y
+CT_TARGET_CFLAGS="-ftls-model=local-exec"
diff --git a/configs/riscv64-zephyr-elf.config b/configs/riscv64-zephyr-elf.config
index 549fc790..20a48b51 100644
--- a/configs/riscv64-zephyr-elf.config
+++ b/configs/riscv64-zephyr-elf.config
@@ -61,3 +61,9 @@ CT_LIBC_NEWLIB_NANO_ENABLE_TARGET_OPTSPACE=y
 # CT_LIBC_NEWLIB_NANO_LTO is not set
 CT_LIBC_NEWLIB_NANO_NANO_MALLOC=y
 CT_LIBC_NEWLIB_NANO_NANO_FORMATTED_IO=y
+CT_COMP_LIBS_PICOLIBC=y
+CT_LIBC_PICOLIBC_SRC_CUSTOM=y
+CT_LIBC_PICOLIBC_CUSTOM_LOCATION="${GITHUB_WORKSPACE}/picolibc"
+CT_LIBC_PICOLIBC_GLOBAL_ATEXIT=y
+CT_LIBC_PICOLIBC_EXTRA_SECTIONS=y
+CT_TARGET_CFLAGS="-ftls-model=local-exec"