diff --git a/toolchain/dbg b/toolchain/dbg
index 91505fb..25a2c58 100755
--- a/toolchain/dbg
+++ b/toolchain/dbg
@@ -1,12 +1,5 @@
 #!/bin/sh -e
 
-if [ -z ${MITTOS64+x} ]; then
-  echo -en "\033[31mWarning: \033[0m"
-  echo "It seems you are trying to build mittos64 in an unsuported environment."
-  echo "This makefile is designed to run inside a mittos64-specific docker container."
-  echo "If you know what you're doing, define the environment variable "MITTOS64""
-  echo "See README.md for more information"
-  exit 1
-fi
+if [ -z ${MITTOS64+x} ]; then >&2 echo "Unsupported environment! See README"; exit 1; fi
 
 gdb -q -x /opt/toolchain/gdbinit
diff --git a/toolchain/emul b/toolchain/emul
index e27322e..e85193a 100755
--- a/toolchain/emul
+++ b/toolchain/emul
@@ -1,13 +1,6 @@
 #!/bin/sh -e
 
-if [ -z ${MITTOS64+x} ]; then
-  echo -en "\033[31mWarning: \033[0m"
-  echo "It seems you are trying to build mittos64 in an unsuported environment."
-  echo "This makefile is designed to run inside a mittos64-specific docker container."
-  echo "If you know what you're doing, define the environment variable "MITTOS64""
-  echo "See README.md for more information"
-  exit 1
-fi
+if [ -z ${MITTOS64+x} ]; then >&2 echo "Unsupported environment! See README"; exit 1; fi
 
 iso=/opt/mittos64.iso
 
diff --git a/toolchain/mkiso b/toolchain/mkiso
index c57a045..c10b478 100755
--- a/toolchain/mkiso
+++ b/toolchain/mkiso
@@ -1,13 +1,6 @@
 #!/bin/sh -e
 
-if [ -z ${MITTOS64+x} ]; then
-  echo -en "\033[31mWarning: \033[0m"
-  echo "It seems you are trying to build mittos64 in an unsuported environment."
-  echo "This makefile is designed to run inside a mittos64-specific docker container."
-  echo "If you know what you're doing, define the environment variable "MITTOS64""
-  echo "See README.md for more information"
-  exit 1
-fi
+if [ -z ${MITTOS64+x} ]; then >&2 echo "Unsupported environment! See README"; exit 1; fi
 
 sysroot=/opt/sysroot
 iso=/opt/mittos64.iso