diff --git a/make.sh b/make.sh
index 60a938426..7e5d3a61a 100755
--- a/make.sh
+++ b/make.sh
@@ -1,5 +1,19 @@
 #!/bin/sh
 set -eu
+
+REQUIRED_GO_MINOR=$(sed -En 's/^go[[:space:]]+([[:digit:].]+)$/\1/p' go.mod)
+ACTUAL_GO_VERSION=$(go version | sed -n 's/^go version go\([0-9]*\.[0-9]*\.[0-9]*\)\(.*\)/\1/p')
+
+# We use 'case' instead of '[' to match values against complex patterns, because POSIX
+# does not guarantee that '[' supports advanced features like globs and regex.
+if case "$ACTUAL_GO_VERSION" in "$REQUIRED_GO_MINOR".*) false ;; *) true ;; esac then
+  red="\e[0;91m"
+  reset="\e[0m"
+
+  printf "${red}PROBLEM: You need go %s to build d2, but you have %s installed.${reset}\n" "$REQUIRED_GO_MINOR" "$ACTUAL_GO_VERSION"
+  exit 1
+fi
+
 if [ ! -e "$(dirname "$0")/ci/sub/.git" ]; then
   set -x
   git submodule update --init