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conan install nas/1.9.4@ --build=nas --profile=/home/conan/w/BuildSingleReference/24668/173a645f-7315-429d-895d-0ed26cc33c86/profile.txt
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Configuration:
[settings]
arch=x86_64
arch_build=x86_64
build_type=Release
compiler=clang
compiler.libcxx=libstdc++
compiler.version=3.9
os=Linux
os_build=Linux
[options]
nas:shared=False
[build_requires]
[env]

nas/1.9.4: Forced build from source
Installing package: nas/1.9.4
Requirements
    nas/1.9.4 from local cache - Cache
    xorg/system from 'conan-center' - Cache
Packages
    nas/1.9.4:aa7ea183e32fd0e01cd05559be5dfd93061df8a0 - Build
    xorg/system:5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9 - Cache
Build requirements
    bison/3.7.1 from 'conan-center' - Cache
    flex/2.6.4 from 'conan-center' - Cache
    m4/1.4.18 from 'conan-center' - Cache
Build requirements packages
    bison/3.7.1:80f43c0a0f4448928ef5088266cb25c225d76dff - Cache
    flex/2.6.4:80f43c0a0f4448928ef5088266cb25c225d76dff - Cache
    m4/1.4.18:24647d9fe8ec489125dfbae4b3ebefaf7581674c - Cache

Installing (downloading, building) binaries...
m4/1.4.18: Already installed!
m4/1.4.18: Appending PATH environment variable: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/bin
m4/1.4.18: Setting M4 environment variable: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/bin/m4
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
xorg/system: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
bison/3.7.1: Already installed!
bison/3.7.1: Setting BISON_ROOT environment variable: /home/conan/w/BuildSingleReference/.conan/data/bison/3.7.1/_/_/package/80f43c0a0f4448928ef5088266cb25c225d76dff
bison/3.7.1: Appending PATH environment variable: /home/conan/w/BuildSingleReference/.conan/data/bison/3.7.1/_/_/package/80f43c0a0f4448928ef5088266cb25c225d76dff/bin
bison/3.7.1: Setting the BISON_PKGDATADIR environment variable: /home/conan/w/BuildSingleReference/.conan/data/bison/3.7.1/_/_/package/80f43c0a0f4448928ef5088266cb25c225d76dff/bin/share/bison
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
flex/2.6.4: Already installed!
[HOOK - conan-center.py] post_package_info(): [CMAKE FILE NOT IN BUILD FOLDERS (KB-H019)] OK
[HOOK - conan-center.py] post_package_info(): [LIBRARY DOES NOT EXIST (KB-H054)] OK
nas/1.9.4: Applying build-requirement: bison/3.7.1
nas/1.9.4: Applying build-requirement: flex/2.6.4
nas/1.9.4: Applying build-requirement: m4/1.4.18
nas/1.9.4: Copying sources to build folder
nas/1.9.4: Building your package in /home/conan/w/BuildSingleReference/.conan/data/nas/1.9.4/_/_/build/aa7ea183e32fd0e01cd05559be5dfd93061df8a0
nas/1.9.4: Generator txt created conanbuildinfo.txt
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] 'fPIC' option not found
[HOOK - conan-center.py] pre_build(): [FPIC MANAGEMENT (KB-H007)] OK
nas/1.9.4: Calling build()

----Running------
> xmkmf
-----------------
nas/1.9.4: 
/bin/sh: 1: xmkmf: not found
m4/1.4.18: WARN: Lib folder doesn't exist, can't collect libraries: /home/conan/w/BuildSingleReference/.conan/data/m4/1.4.18/_/_/package/24647d9fe8ec489125dfbae4b3ebefaf7581674c/lib
xorg/system: WARN: Lib folder doesn't exist, can't collect libraries: /home/conan/w/BuildSingleReference/.conan/data/xorg/system/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/lib
nas/1.9.4: WARN: Build folder is dirty, removing it: /home/conan/w/BuildSingleReference/.conan/data/nas/1.9.4/_/_/build/aa7ea183e32fd0e01cd05559be5dfd93061df8a0
nas/1.9.4: ERROR: Package 'aa7ea183e32fd0e01cd05559be5dfd93061df8a0' build failed
nas/1.9.4: WARN: Build folder /home/conan/w/BuildSingleReference/.conan/data/nas/1.9.4/_/_/build/aa7ea183e32fd0e01cd05559be5dfd93061df8a0
ERROR: nas/1.9.4: Error in build() method, line 43
	self.run("xmkmf")
	ConanException: Error 127 while executing xmkmf