diff --git a/scripts/build/companion_libs/050-zlib.sh b/scripts/build/companion_libs/050-zlib.sh
index 45518e9e58..6e17819e8d 100644
--- a/scripts/build/companion_libs/050-zlib.sh
+++ b/scripts/build/companion_libs/050-zlib.sh
@@ -97,8 +97,13 @@ do_zlib_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking zlib"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking zlib"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for zlib on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing zlib"
diff --git a/scripts/build/companion_libs/100-gmp.sh b/scripts/build/companion_libs/100-gmp.sh
index 6b526c80dd..c81874a8f2 100644
--- a/scripts/build/companion_libs/100-gmp.sh
+++ b/scripts/build/companion_libs/100-gmp.sh
@@ -106,8 +106,13 @@ do_gmp_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking GMP"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking GMP"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for GMP on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing GMP"
diff --git a/scripts/build/companion_libs/110-mpfr.sh b/scripts/build/companion_libs/110-mpfr.sh
index 4b9bc64a80..a7b7f72944 100644
--- a/scripts/build/companion_libs/110-mpfr.sh
+++ b/scripts/build/companion_libs/110-mpfr.sh
@@ -149,8 +149,13 @@ do_mpfr_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking MPFR"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking MPFR"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for MPFR on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing MPFR"
diff --git a/scripts/build/companion_libs/121-isl.sh b/scripts/build/companion_libs/121-isl.sh
index 8783f2dbd3..ef93bbd6e8 100644
--- a/scripts/build/companion_libs/121-isl.sh
+++ b/scripts/build/companion_libs/121-isl.sh
@@ -115,8 +115,13 @@ do_isl_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking ISL"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking ISL"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for ISL on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing ISL"
diff --git a/scripts/build/companion_libs/130-cloog.sh b/scripts/build/companion_libs/130-cloog.sh
index b6ea1e58b5..b21b028c9a 100644
--- a/scripts/build/companion_libs/130-cloog.sh
+++ b/scripts/build/companion_libs/130-cloog.sh
@@ -112,8 +112,13 @@ do_cloog_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking CLooG"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking CLooG"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for CLooG on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing CLooG"
diff --git a/scripts/build/companion_libs/140-mpc.sh b/scripts/build/companion_libs/140-mpc.sh
index acb5fd3f85..e6efb4f7ea 100644
--- a/scripts/build/companion_libs/140-mpc.sh
+++ b/scripts/build/companion_libs/140-mpc.sh
@@ -100,8 +100,13 @@ do_mpc_backend() {
     CT_DoExecLog ALL make ${JOBSFLAGS}
 
     if [ "${CT_COMPLIBS_CHECK}" = "y" ]; then
-        CT_DoLog EXTRA "Checking MPC"
-        CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        if [ "${host}" = "${CT_BUILD}" ]; then
+            CT_DoLog EXTRA "Checking MPC"
+            CT_DoExecLog ALL make ${JOBSFLAGS} -s check
+        else
+            # Cannot run host binaries on build in a canadian cross
+            CT_DoLog EXTRA "Skipping check for MPC on the host"
+        fi
     fi
 
     CT_DoLog EXTRA "Installing MPC"