diff --git a/coursier.bzl b/coursier.bzl
index c7d9269a1..4a22aed31 100644
--- a/coursier.bzl
+++ b/coursier.bzl
@@ -49,12 +49,11 @@ genrule(
 sh_binary(
     name = "pin",
     srcs = ["pin.sh"],
-    args = [
-      "$(location :jq-binary)",
-    ],
-    data = [
-        ":jq-binary",
-    ],
+    # Cannot use $(location)/$(rootpath) because we'll be an external repository
+    # relative to where the build is taking place
+    args = [repository_name()[1:] + "/jq"],
+    deps = ["@bazel_tools//tools/bash/runfiles"],
+    data = [":jq-binary"],
 )
 """
 
diff --git a/private/pin.sh b/private/pin.sh
index 24ed745be..102be141c 100644
--- a/private/pin.sh
+++ b/private/pin.sh
@@ -1,12 +1,22 @@
 #!/usr/bin/env bash
 
-set -euo pipefail
+# --- begin runfiles.bash initialization v2 ---
+# Copy-pasted from the Bazel Bash runfiles library v2.
+set -euo pipefail; f=bazel_tools/tools/bash/runfiles/runfiles.bash
+source "${RUNFILES_DIR:-/dev/null}/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "${RUNFILES_MANIFEST_FILE:-/dev/null}" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$0.runfiles/$f" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  source "$(grep -sm1 "^$f " "$0.exe.runfiles_manifest" | cut -f2- -d' ')" 2>/dev/null || \
+  { echo>&2 "ERROR: cannot find $f"; exit 1; }; f=; set -e
+# --- end runfiles.bash initialization v2 ---
+
 readonly maven_install_json_loc={maven_install_location}
 # This script is run as a `sh_binary`, so ensure we are in the calling workspace before running Bazel.
 readonly execution_root=$(cd "$(dirname "$maven_install_json_loc")" && bazel info execution_root)
 readonly workspace_name=$(basename "$execution_root")
 # `jq` is a platform-specific dependency with an unpredictable path.
-readonly jq=$1
+readonly jq=$(rlocation $1)
 cat <<"RULES_JVM_EXTERNAL_EOF" | "$jq" --sort-keys --indent 4 . - > $maven_install_json_loc
 {dependency_tree_json}
 RULES_JVM_EXTERNAL_EOF