diff --git a/llvm-toolset-20.spec b/llvm-toolset-20.spec
index c6ecc22ee9bf6386ef2e9fe6ccca195e1aa7485a..22e310c0e4c293eaf5245c714e2f60ca7908bf1f 100644
--- a/llvm-toolset-20.spec
+++ b/llvm-toolset-20.spec
@@ -18,7 +18,7 @@
 %endif
 
 # Build sys_llvm packages or compat packages
-%bcond_with sys_llvm
+%bcond_with sys_llvm_20
 %bcond_with check
 %bcond_without toolchain_clang
 
@@ -47,7 +47,7 @@
 
 #region LLVM globals
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %global pkg_name_llvm llvm
 %global install_prefix /usr
 %global install_bindir %{_bindir}
@@ -167,7 +167,7 @@
 #region main package
 Name:		  llvm-toolset-%{maj_ver}
 Version:	%{maj_ver}.%{min_ver}.%{patch_ver}
-Release:	2
+Release:	3
 Summary:	The Low Level Virtual Machine
 
 License:	NCSA
@@ -425,7 +425,7 @@ Provides: clang-devel(major) = %{maj_ver}
 # add a Provides so users can just run "dnf install clangd."
 # This Provides is only present in the primary, unversioned clang package.
 # Users who want the compat versions can install them using the full name.
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 Provides: clangd = %{version}-%{release}
 %endif
 
@@ -478,7 +478,7 @@ Requires:	python3
 %description -n %{?scl_prefix}git-clang-format
 clang-format integration for git.
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %package -n python3-clang
 Summary:       Python3 bindings for clang
 Requires:      %{pkg_name_clang}-devel%{?_isa} = %{version}-%{release}
@@ -557,7 +557,7 @@ The LLVM project linker.
 %package -n %{pkg_name_lld}-devel
 Summary:	Libraries and header files for LLD
 Requires: %{pkg_name_lld}-libs%{?_isa} = %{version}-%{release}
-# %if %{with sys_llvm}
+# %if %{with sys_llvm_20}
 # lld tools are referenced in the cmake files, so we need to add lld as a
 # dependency.
 # Requires: %{pkg_name_lld}%{?_isa} = %{version}-%{release}
@@ -586,7 +586,7 @@ License:	Apache-2.0 WITH LLVM-exception OR NCSA
 URL:		http://lldb.llvm.org/
 
 Requires:	%{pkg_name_clang}-libs%{?_isa} = %{version}-%{release}
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 Requires:	python%{python3_pkgversion}-lldb = %{version}-%{release}
 %endif
 
@@ -603,7 +603,7 @@ Requires:	%{pkg_name_lldb}%{?_isa} = %{version}-%{release}
 %description -n %{pkg_name_lldb}-devel
 The package contains header files for the LLDB debugger.
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %package -n python%{python3_pkgversion}-lldb
 %{?python_provide:%python_provide python%{python3_pkgversion}-lldb}
 Summary:	Python module for LLDB
@@ -645,7 +645,7 @@ Requires: %{pkg_name_mlir}-static%{?_isa} = %{version}-%{release}
 %description -n %{pkg_name_mlir}-devel
 MLIR development files.
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %package -n python%{python3_pkgversion}-mlir
 %{?python_provide:%python_provide python%{python3_pkgversion}-mlir}
 Summary:	MLIR python bindings
@@ -1239,7 +1239,7 @@ install %{build_libdir}/libLLVMTestingAnnotations.a %{buildroot}%{install_libdir
 # Fix multi-lib
 %multilib_fix_c_header --file %{install_includedir}/llvm/Config/llvm-config.h
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 
 # Fix some man pages
 ln -s llvm-config.1 %{buildroot}%{_mandir}/man1/llvm-config%{exec_suffix}-%{__isa_bits}.1
@@ -1309,7 +1309,7 @@ ln -s %{install_datadir}/clang/clang-format-diff.py %{buildroot}%{install_bindir
 # File in the macros file for other packages to use.  We are not doing this
 # in the compat package, because the version macros would # conflict with
 # eachother if both clang and the clang compat package were installed together.
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 
 # install clang python bindings
 mkdir -p %{buildroot}%{python3_sitelib}/clang/
@@ -1364,7 +1364,7 @@ ln -s clang++  %{buildroot}%{install_bindir}/clang++-%{maj_ver}
 
 # Create Manpage symlinks
 ln -s clang%{exec_suffix}.1.gz %{buildroot}%{_mandir}/man1/clang++%{exec_suffix}.1.gz
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 ln -s clang.1.gz %{buildroot}%{_mandir}/man1/clang-%{maj_ver}.1.gz
 ln -s clang.1.gz %{buildroot}%{_mandir}/man1/clang++-%{maj_ver}.1.gz
 %endif
@@ -1443,7 +1443,7 @@ rm %{buildroot}%{install_bindir}/llvm-omp-kernel-replay
 
 #region LLD installation
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 # Required when using update-alternatives:
 # https://docs.fedoraproject.org/en-US/packaging-guidelines/Alternatives/
 touch %{buildroot}%{_bindir}/ld
@@ -1459,7 +1459,7 @@ install -D -m 644 -t  %{buildroot}%{_mandir}/man1/ lld/docs/ld.lld.1
 
 # python: fix binary libraries location
 liblldb=$(basename $(readlink -e %{buildroot}%{install_libdir}/liblldb.so))
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 mkdir -p %{buildroot}%{python3_sitearch}
 # /usr/lib/../usr/lib64 == /usr/lib64, in which case mv (or cp -r) would complain
 # mv %{buildroot}%{install_prefix}/..%{python3_sitearch}/lldb %{buildroot}%{python3_sitearch}/lldb
@@ -1474,7 +1474,7 @@ rm -rf %{buildroot}%{install_prefix}/..%{python3_sitearch}/lldb
 #region mlir installation
 %if %{with mlir}
 %if %{with mlir_python_binding}
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 mkdir -p %{buildroot}/%{python3_sitearch}
 mv %{buildroot}%{install_prefix}/python_packages/mlir_core/mlir %{buildroot}/%{python3_sitearch}
 %endif
@@ -1510,7 +1510,7 @@ popd
 rm -f %{buildroot}%{_libdir}/libLLVMBOLT*.a
 #endregion BOLT installation
 
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 # Add version suffix to binaries. Do this at the end so it includes any
 # additional binaries that may be been added by other steps.
 for f in %{buildroot}/%{install_bindir}/*; do
@@ -1527,7 +1527,7 @@ done
 # infrastructure. Without compat, cmake points to the symlink, with compat it
 # points to the original file.
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 
 mv %{buildroot}/%{install_bindir}/llvm-config %{buildroot}/%{install_bindir}/llvm-config%{exec_suffix}-%{__isa_bits}
 # We still maintain a versionned symlink for consistency across llvm versions.
@@ -1555,7 +1555,7 @@ install -m 0755 ../llvm-compat-libs/lib/libclang-cpp.so.%{compat_maj_ver}* %{bui
 install -m 0755 ../llvm-compat-libs/lib/liblldb.so.%{compat_maj_ver}* %{buildroot}%{_libdir}
 %endif
 
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 cat <<EOF > %{buildroot}%{_scl_scripts}/enable
 # General environment variables
 export PATH=%{install_bindir}\${PATH:+:\${PATH}}
@@ -1983,13 +1983,13 @@ export LIT_XFAIL="$LIT_XFAIL;RISCV/mapping-syms.s"
 #region misc
 %ldconfig_scriptlets -n %{pkg_name-llvm}-libs
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %ldconfig_scriptlets -n %{pkg_name_lld}-libs
 %endif
 
 %post -n %{pkg_name_llvm}-devel
 %{_sbindir}/update-alternatives --install %{_bindir}/llvm-config%{exec_suffix} llvm-config%{exec_suffix} %{install_bindir}/llvm-config%{exec_suffix}-%{__isa_bits} %{__isa_bits}
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %{_sbindir}/update-alternatives --install %{_bindir}/llvm-config-%{maj_ver} llvm-config-%{maj_ver} %{install_bindir}/llvm-config%{exec_suffix}-%{__isa_bits} %{__isa_bits}
 
 # During the upgrade from LLVM 16 (F38) to LLVM 17 (F39), we found out the
@@ -2007,7 +2007,7 @@ done
 if [ $1 -eq 0 ]; then
   %{_sbindir}/update-alternatives --remove llvm-config%{exec_suffix} %{install_bindir}/llvm-config%{exec_suffix}-%{__isa_bits}
 fi
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 # When upgrading between minor versions (i.e. from x.y.1 to x.y.2), we must
 # not remove the alternative.
 # However, during a major version upgrade (i.e. from 16.x.y to 17.z.w), the
@@ -2019,7 +2019,7 @@ if [[ $1 -eq 0
 fi
 %endif
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %post -n %{pkg_name_lld}
 %{_sbindir}/update-alternatives --install %{_bindir}/ld ld %{_bindir}/ld.lld 1
 
@@ -2044,7 +2044,7 @@ fi
 
 #region LLVM files
 %files -n llvm-toolset-%{maj_ver}
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_scl_scripts}/enable
 %endif
 
@@ -2209,7 +2209,7 @@ fi
 %{install_bindir}/llvm-tapi-diff
 %endif
 
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 # This is for all the binaries with the version suffix.
 %{_bindir}/bugpoint%{exec_suffix}
 %{_bindir}/dsymutil%{exec_suffix}
@@ -2327,7 +2327,7 @@ fi
 %{install_libdir}/libLLVM-%{maj_ver}%{?llvm_snapshot_version_suffix}.so
 %if %{with gold}
 %{install_libdir}/LLVMgold.so
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %{_libdir}/bfd-plugins/LLVMgold.so
 %endif
 %else
@@ -2342,14 +2342,14 @@ fi
 %endif
 %{install_libdir}/libLTO.so*
 %{install_libdir}/libRemarks.so*
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %config(noreplace) %{_sysconfdir}/ld.so.conf.d/%{pkg_name_llvm}-%{_arch}.conf
 %endif
 
 %files -n %{pkg_name_llvm}-devel
 %license llvm/LICENSE.TXT
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %ghost %{_bindir}/llvm-config
 %{install_bindir}/llvm-config-%{__isa_bits}
 %else
@@ -2386,7 +2386,7 @@ fi
 %{install_bindir}/lli-child-target
 %{install_bindir}/llvm-isel-fuzzer
 %{install_bindir}/llvm-opt-fuzzer
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/not%{exec_suffix}
 %{_bindir}/count%{exec_suffix}
 %{_bindir}/yaml-bench%{exec_suffix}
@@ -2423,7 +2423,7 @@ fi
 %{install_bindir}/clang-cpp
 %{_mandir}/man1/clang-%{maj_ver}.1.gz
 %{_mandir}/man1/clang++-%{maj_ver}.1.gz
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %{_mandir}/man1/clang.1.gz
 %{_mandir}/man1/clang++.1.gz
 %else
@@ -2447,7 +2447,7 @@ fi
 %{install_includedir}/clang-c/
 %{install_libdir}/cmake/clang
 %{install_bindir}/clang-tblgen
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/clang-tblgen-%{maj_ver}
 %endif
 %dir %{install_datadir}/clang/
@@ -2468,7 +2468,7 @@ fi
 %{install_bindir}/analyze-build
 %{install_bindir}/intercept-build
 %{install_bindir}/scan-build-py
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/scan-view-%{maj_ver}
 %{_bindir}/scan-build-%{maj_ver}
 %{_bindir}/analyze-build-%{maj_ver}
@@ -2484,7 +2484,7 @@ fi
 %{install_datadir}/scan-view/
 %{install_datadir}/scan-build/
 %{_mandir}/man1/scan-build%{exec_suffix}.1.*
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %{python3_sitelib}/libear
 %{python3_sitelib}/libscanbuild
 %endif
@@ -2531,7 +2531,7 @@ fi
 %{install_bindir}/clang-pseudo
 %{install_bindir}/clang-rename
 %endif
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/amdgpu-arch-%{maj_ver}
 %{_bindir}/clang-apply-replacements-%{maj_ver}
 %{_bindir}/clang-change-namespace-%{maj_ver}
@@ -2597,11 +2597,11 @@ fi
 %files -n %{?scl_prefix}git-clang-format
 %license clang/LICENSE.TXT
 %{install_bindir}/git-clang-format
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/git-clang-format-%{maj_ver}
 %endif
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %files -n python%{python3_pkgversion}-clang
 %license clang/LICENSE.TXT
 %{python3_sitelib}/clang/
@@ -2716,7 +2716,7 @@ fi
 %{install_bindir}/ld.lld
 %{install_bindir}/ld64.lld
 %{install_bindir}/wasm-ld
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %{_mandir}/man1/ld.lld.1*
 %else
 %{_bindir}/lld%{exec_suffix}
@@ -2760,7 +2760,7 @@ fi
 %files -n %{pkg_name_lldb}
 %license lldb/LICENSE.TXT
 %{install_bindir}/lldb*
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/lldb*
 %endif
 # Usually, *.so symlinks are kept in devel subpackages. However, the python
@@ -2779,7 +2779,7 @@ fi
 %files -n %{pkg_name_lldb}-devel
 %{install_includedir}/lldb
 
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %files -n python%{python3_pkgversion}-lldb
 %{python3_sitearch}/lldb
 %endif
@@ -2823,7 +2823,7 @@ fi
 %{install_bindir}/mlir-query
 %{install_bindir}/tblgen-to-irdl
 %endif
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %if %{maj_ver} >= 20
 %{_bindir}/mlir-rewrite-%{maj_ver}
 %{_bindir}/mlir-runner-%{maj_ver}
@@ -2861,7 +2861,7 @@ fi
 %{install_libdir}/libMLIR*.so
 
 %if %{with mlir_python_binding}
-%if %{with sys_llvm}
+%if %{with sys_llvm_20}
 %files -n python%{python3_pkgversion}-mlir
 %{python3_sitearch}/mlir/
 %endif
@@ -2949,7 +2949,7 @@ fi
 %{install_libdir}/libbolt_rt_hugify.a
 %{install_libdir}/libbolt_rt_instr.a
 
-%if %{without sys_llvm}
+%if %{without sys_llvm_20}
 %{_bindir}/llvm-bolt-%{maj_ver}
 %if %{maj_ver} >= 20
 %{_bindir}/llvm-bolt-binary-analysis-%{maj_ver}
@@ -2966,6 +2966,9 @@ fi
 #endregion files
 
 %changelog
+* Fri Dec 05 2025 jchzhou <zhoujiacheng@iscas.ac.cn> - 20.1.8-3
+- Rename the 'sys_llvm' bcond to be unique for easier override in build environments
+
 * Fri Oct 31 2025 mahailiang <mahailiang@uniontech.com> - 20.1.8-2
 - fix loongarch64 build error