Cannot install from source on Windows with go 1.25.5 and clang 21.1.7

[clin1234]

can't install github.com/projectdiscovery/nuclei/v3/cmd/nuclei:
go: downloading github.com/projectdiscovery/nuclei/v3 v3.6.1
go: downloading github.com/projectdiscovery/gologger v1.1.64
go: downloading github.com/projectdiscovery/retryablehttp-go v1.1.1
go: downloading github.com/projectdiscovery/dsl v0.8.8
go: downloading github.com/projectdiscovery/fastdialer v0.4.20
go: downloading github.com/projectdiscovery/networkpolicy v0.1.32
go: downloading github.com/projectdiscovery/wappalyzergo v0.2.59
go: downloading github.com/ericlagergren/decimal v0.0.0-20240411145413-00de7ca16731
# github.com/projectdiscovery/nuclei/v3/cmd/nuclei
C:\Users\שזדס\.g\go\pkg\tool\windows_amd64\link.exe: running clang failed: exit status 1
C:\Users\שזדס\scoop\shims\clang.exe -m64 -mconsole -Wl,--tsaware -Wl,--nxcompat -Wl,--major-os-version=6 -Wl,--minor-os-version=1 -Wl,--major-subsystem-version=6 -Wl,--minor-subsystem-version=1 -Wl,--dynamicbase -Wl,--high-entropy-va -o $WORK\b001\exe\a.out.exe -Qunused-arguments -Wl,--no-insert-timestamp C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\go.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000000.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000001.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000002.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000003.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000004.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000005.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000006.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000007.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000008.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000009.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000010.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000011.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000012.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000013.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000014.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000015.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000016.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000017.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000018.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000019.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000020.o C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\000021.o -O2 -g -O2 -g -Wl,--start-group -lmingwex -lmingw32 -Wl,--end-group -lkernel32
ld.lld: error: undefined symbol: encoding/json.isValidNumber
>>> referenced by C:/Users/שזדס/go/pkg/mod/github.com/bytedance/sonic@v1.14.0/internal/encoder/vm/vm.go:186
>>>               C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\go.o:(github.com/bytedance/sonic/internal/encoder/vm.Execute)
>>> referenced by C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\go.o:(go:func.*)

ld.lld: error: undefined symbol: encoding/json.typeFields
>>> referenced by C:/Users/שזדס/go/pkg/mod/github.com/bytedance/sonic@v1.14.0/internal/resolver/resolver.go:117
>>>               C:\Users\98BD~1\AppData\Local\Temp\go-link-3684525593\go.o:(github.com/bytedance/sonic/internal/resolver.resolveFields)
clang-21: error: linker command failed with exit code 1 (use -v to see invocation)

❯ clang -v
clang version 21.1.7 (https://github.com/llvm/llvm-project.git 292dc2b86f66e39f4b85ec8b185fd8b60f5213ce)
Target: x86_64-w64-windows-gnu
Thread model: posix
InstalledDir: C:/Users/שזדס/scoop/apps/mingw-mstorsjo-llvm-ucrt/21.1.7-20251202/bin
Configuration file: C:/Users/שזדס/scoop/apps/mingw-mstorsjo-llvm-ucrt/21.1.7-20251202/bin/x86_64-w64-windows-gnu.cfg

[bad-antics]

This is a known issue with bytedance/sonic on Windows with CGO. The linker can't find encoding/json internal symbols.

Solution - Disable CGO:

$env:CGO_ENABLED="0"
go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest

Or in CMD:

set CGO_ENABLED=0
go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest

Why this works:
When CGO is disabled, Go uses its pure-Go fallback for JSON encoding instead of the sonic library's CGO-dependent optimizations.

Alternative - Use pre-built binary:
Download from https://github.com/projectdiscovery/nuclei/releases

The pre-built Windows binaries don't have this issue.

Note: This is similar to the Go 1.26rc2 issue (#6787) - both stem from bytedance/sonic's CGO requirements on Windows.

[bad-antics]

This is a known issue with bytedance/sonic on Windows with CGO. The linker can't find encoding/json internal symbols.

Solution - Disable CGO:

$env:CGO_ENABLED="0"
go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest

Or in CMD:

set CGO_ENABLED=0
go install -v github.com/projectdiscovery/nuclei/v3/cmd/nuclei@latest

Why this works:
When CGO is disabled, Go uses its pure-Go fallback for JSON encoding instead of the sonic library's CGO-dependent optimizations.

Alternative - Use pre-built binary:
Download from https://github.com/projectdiscovery/nuclei/releases

The pre-built Windows binaries don't have this issue.

Note: This is similar to the Go 1.26rc2 issue (#6787) - both stem from bytedance/sonic's CGO requirements on Windows.