diff --git a/conda/build.sh b/conda/build.sh
index e79fab8..90f04c7 100644
--- a/conda/build.sh
+++ b/conda/build.sh
@@ -17,10 +17,10 @@ then
     export LD=${GXX}
     export CC=${GCC}
     export CXX=${GXX}
-    export PKG_CONFIG_EXECUTABLE=$(basename $(which pkg-config))
+    # export PKG_CONFIG_EXECUTABLE=$(basename $(which pkg-config))
 
     export PATH=${PWD}:${PATH}
-    export SYSROOT="${CONDA_BUILD_SYSROOT}"
+    # export SYSROOT="${CONDA_BUILD_SYSROOT}"
 fi
 
 alias qmake='${CONDA_PREFIX}/bin/qmake'
diff --git a/pyproject-linux.toml b/pyproject-linux.toml
index f1126d1..74b4046 100644
--- a/pyproject-linux.toml
+++ b/pyproject-linux.toml
@@ -1,6 +1,6 @@
  # Specify the build system.
 [build-system]
-requires = ["sip >=6.0.2, <7", "PyQt-builder >=1.6, <2"]
+requires = ["sip", "PyQt-builder"]
 build-backend = "sipbuild.api"
 
 # Specify the PEP 566 metadata for the project.
@@ -13,19 +13,19 @@ author = "Frederic Boudon"
 author-email = "frederic.boudon@cirad.fr"
 license = "GPL v3"
 #description-file = "README"
-requires-dist = "PyQt5 (>=5.12)"
+#requires-dist = "PyQt5 (>=5.12)"
 
 [tool.sip.bindings.PyQGLViewer]
 qmake-QT = ['xml opengl gui widgets']
-qmake-CONFIG = ['c++14']
+#qmake-CONFIG = ['c++14']
 libraries = ['QGLViewer','GLU']
 tags = ['QGLViewer_2_9_1']
 #include-dirs=['${CONDA_PREFIX}/include','${PREFIX}/include']
 #library-dirs=['${CONDA_PREFIX}/lib','${PREFIX}/lib']
-extra-compile-args=['-I${CONDA_PREFIX}/include','-I${PREFIX}/include','-I${BUILD_PREFIX}/${HOST}/sysroot/usr/include']
+extra-compile-args=['-I${CONDA_PREFIX}/include','-I${PREFIX}/include','-I${CONDA_BUILD_SYSROOT}/usr/include']
 extra-link-args=['-L${CONDA_PREFIX}/lib','-L${PREFIX}/lib']
 
 [tool.sip.project]
 sip-module="PyQt5.sip"
-abi-version='12.8'
+#abi-version='12.8'