diff --git a/package/pnetcdf/1.11.2/install.sh b/package/pnetcdf/1.11.2/install.sh
index 130bb99271d830546f08691ba7746c0eb5096483..113600414e03af619e9cc196984e6963539ff201 100755
--- a/package/pnetcdf/1.11.2/install.sh
+++ b/package/pnetcdf/1.11.2/install.sh
@@ -9,9 +9,8 @@ rm -rf pnetcdf-${pnetcdf_ver}
 tar zxvf ${JARVIS_DOWNLOAD}/pnetcdf-${pnetcdf_ver}.tar.gz
 cd pnetcdf-${pnetcdf_ver}
 use_gcc=0
-which_mpicc=`which mpicc 2> /dev/null 1> /dev/null`
-which_ret=$?
-if [ "$which_ret" -eq "0" ]; then
+which mpicc 2> /dev/null 1> /dev/null
+if [ "$?" -eq "0" ]; then
         if [ "`mpicc --version | grep gcc`" ]; then
                 use_gcc=1
         fi
@@ -19,7 +18,7 @@ fi
 FFLAGS=""
 FCFLAGS=""
 if [ "$use_gcc" -eq "1" ]; then
-        if [ "`$CC --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
+        if [ "`mpicc --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
                 FFLAGS="-fallow-argument-mismatch"
                 FCFLAGS="-fallow-argument-mismatch"
         fi
diff --git a/package/pnetcdf/1.12.1/install.sh b/package/pnetcdf/1.12.1/install.sh
index 997edbeaa0c89f28bf28a2a51056b2089bd2435e..df66345f4e56c804ff233a3fe07cead92e2c65c6 100755
--- a/package/pnetcdf/1.12.1/install.sh
+++ b/package/pnetcdf/1.12.1/install.sh
@@ -8,9 +8,8 @@ rm -rf pnetcdf-${pnetcdf_version}
 tar zxvf ${JARVIS_DOWNLOAD}/pnetcdf-${pnetcdf_version}.tar.gz
 cd pnetcdf-${pnetcdf_version}
 use_gcc=0
-which_mpicc=`which mpicc 2> /dev/null 1> /dev/null`
-which_ret=$?
-if [ "$which_ret" -eq "0" ]; then
+which mpicc 2> /dev/null 1> /dev/null
+if [ "$?" -eq "0" ]; then
         if [ "`mpicc --version | grep gcc`" ]; then
                 use_gcc=1
         fi
@@ -18,7 +17,7 @@ fi
 FFLAGS=""
 FCFLAGS=""
 if [ "$use_gcc" -eq "1" ]; then
-        if [ "`$CC --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
+        if [ "`mpicc --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
                 FFLAGS="-fallow-argument-mismatch"
                 FCFLAGS="-fallow-argument-mismatch"
         fi
diff --git a/package/pnetcdf/1.12.3/install.sh b/package/pnetcdf/1.12.3/install.sh
index 7852f8e197a5bc43aba568510fdb2a06ef81d14b..40783e736d0c5bfd2ea77e8e2cf368bf6b61d8c3 100755
--- a/package/pnetcdf/1.12.3/install.sh
+++ b/package/pnetcdf/1.12.3/install.sh
@@ -7,9 +7,8 @@ cd ${JARVIS_TMP}
 tar zxvf ${JARVIS_DOWNLOAD}/pnetcdf-${pnetcdf_version}.tar.gz
 cd pnetcdf-${pnetcdf_version}
 use_gcc=0
-which_mpicc=`which mpicc 2> /dev/null 1> /dev/null`
-which_ret=$?
-if [ "$which_ret" -eq "0" ]; then
+which mpicc 2> /dev/null 1> /dev/null
+if [ "$?" -eq "0" ]; then
         if [ "`mpicc --version | grep gcc`" ]; then
                 use_gcc=1
         fi
@@ -17,7 +16,7 @@ fi
 FFLAGS="-fPIC"
 FCFLAGS="-fPIC"
 if [ "$use_gcc" -eq "1" ]; then
-        if [ "`$CC --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
+        if [ "`mpicc --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
                 FFLAGS="$FFLAGS -fallow-argument-mismatch"
                 FCFLAGS="$FCFLAGS -fallow-argument-mismatch"
         fi
diff --git a/package/pnetcdf/1.9.0/install.sh b/package/pnetcdf/1.9.0/install.sh
index e910f9e7aa40593338144c4d9e1affb210bfdde8..a4279a74d830884b1c91af1b4eda247caa969dc0 100644
--- a/package/pnetcdf/1.9.0/install.sh
+++ b/package/pnetcdf/1.9.0/install.sh
@@ -9,9 +9,8 @@ rm -rf pnetcdf-${pnetcdf_ver}
 tar zxvf ${JARVIS_DOWNLOAD}/parallel-netcdf-1.9.0.tar.gz
 cd parallel-netcdf-1.9.0
 use_gcc=0
-which_mpicc=`which mpicc 2> /dev/null 1> /dev/null`
-which_ret=$?
-if [ "$which_ret" -eq "0" ]; then
+which mpicc 2> /dev/null 1> /dev/null
+if [ "$?" -eq "0" ]; then
         if [ "`mpicc --version | grep gcc`" ]; then
                 use_gcc=1
         fi
@@ -19,7 +18,7 @@ fi
 FFLAGS=""
 FCFLAGS=""
 if [ "$use_gcc" -eq "1" ]; then
-        if [ "`$CC --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
+        if [ "`mpicc --version | grep gcc | grep -oP \"\)\s*\K[0-9]+(?=\.)\"`" -ge '10' ]; then
                 FFLAGS="-fallow-argument-mismatch"
                 FCFLAGS="-fallow-argument-mismatch"
         fi