diff --git a/jmh/jmh.bzl b/jmh/jmh.bzl
index eb4571043..2bd8c6fba 100644
--- a/jmh/jmh.bzl
+++ b/jmh/jmh.bzl
@@ -8,7 +8,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_openjdk_jmh_jmh_core",
         artifact = "org.openjdk.jmh:jmh-core:1.20",
-        jar_sha256 = "1688db5110ea6413bf63662113ed38084106ab1149e020c58c5ac22b91b842ca",
+        artifact_sha256 = "1688db5110ea6413bf63662113ed38084106ab1149e020c58c5ac22b91b842ca",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -19,7 +19,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_openjdk_jmh_jmh_generator_asm",
         artifact = "org.openjdk.jmh:jmh-generator-asm:1.20",
-        jar_sha256 = "2dd4798b0c9120326310cda3864cc2e0035b8476346713d54a28d1adab1414a5",
+        artifact_sha256 = "2dd4798b0c9120326310cda3864cc2e0035b8476346713d54a28d1adab1414a5",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -30,7 +30,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_openjdk_jmh_jmh_generator_reflection",
         artifact = "org.openjdk.jmh:jmh-generator-reflection:1.20",
-        jar_sha256 = "57706f7c8278272594a9afc42753aaf9ba0ba05980bae0673b8195908d21204e",
+        artifact_sha256 = "57706f7c8278272594a9afc42753aaf9ba0ba05980bae0673b8195908d21204e",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -42,7 +42,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_ows2_asm_asm",
         artifact = "org.ow2.asm:asm:6.1.1",
-        jar_sha256 = "dd3b546415dd4bade2ebe3b47c7828ab0623ee2336604068e2d81023f9f8d833",
+        artifact_sha256 = "dd3b546415dd4bade2ebe3b47c7828ab0623ee2336604068e2d81023f9f8d833",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -53,7 +53,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_net_sf_jopt_simple_jopt_simple",
         artifact = "net.sf.jopt-simple:jopt-simple:5.0.3",
-        jar_sha256 = "6f45c00908265947c39221035250024f2caec9a15c1c8cf553ebeecee289f342",
+        artifact_sha256 = "6f45c00908265947c39221035250024f2caec9a15c1c8cf553ebeecee289f342",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -65,7 +65,7 @@ def jmh_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_apache_commons_commons_math3",
         artifact = "org.apache.commons:commons-math3:3.6.1",
-        jar_sha256 = "1e56d7b058d28b65abd256b8458e3885b674c1d588fa43cd7d1cbb9c7ef2b308",
+        artifact_sha256 = "1e56d7b058d28b65abd256b8458e3885b674c1d588fa43cd7d1cbb9c7ef2b308",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/junit/junit.bzl b/junit/junit.bzl
index 0aa71b4f5..ad97ff1fe 100644
--- a/junit/junit.bzl
+++ b/junit/junit.bzl
@@ -7,7 +7,7 @@ def junit_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_junit_junit",
         artifact = "junit:junit:4.12",
-        jar_sha256 = "59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a",
+        artifact_sha256 = "59721f0805e223d84b90677887d9ff567dc534d7c502ca903c0c2b17f05c116a",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -19,7 +19,7 @@ def junit_repositories(maven_servers = ["http://central.maven.org/maven2"]):
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_org_hamcrest_hamcrest_core",
         artifact = "org.hamcrest:hamcrest-core:1.3",
-        jar_sha256 = "66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9",
+        artifact_sha256 = "66fdef91e9739348df7a096aa384a5685f4e875584cce89386a7a47251c4d8e9",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/scala/scala.bzl b/scala/scala.bzl
index 5731e0e8f..5fb11025c 100644
--- a/scala/scala.bzl
+++ b/scala/scala.bzl
@@ -437,7 +437,7 @@ def scala_repositories(
             major_version = major_version,
             extra_jar_version = scala_version_extra_jars["scalatest"]["version"],
         ),
-        jar_sha256 = scala_version_extra_jars["scalatest"]["sha256"],
+        artifact_sha256 = scala_version_extra_jars["scalatest"]["sha256"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -447,7 +447,7 @@ def scala_repositories(
             major_version = major_version,
             extra_jar_version = scala_version_extra_jars["scalactic"]["version"],
         ),
-        jar_sha256 = scala_version_extra_jars["scalactic"]["sha256"],
+        artifact_sha256 = scala_version_extra_jars["scalactic"]["sha256"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -458,7 +458,7 @@ def scala_repositories(
             major_version = major_version,
             extra_jar_version = scala_version_extra_jars["scala_xml"]["version"],
         ),
-        jar_sha256 = scala_version_extra_jars["scala_xml"]["sha256"],
+        artifact_sha256 = scala_version_extra_jars["scala_xml"]["sha256"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -470,7 +470,7 @@ def scala_repositories(
                 major_version = major_version,
                 extra_jar_version = scala_version_extra_jars["scala_parser_combinators"]["version"],
             ),
-        jar_sha256 = scala_version_extra_jars["scala_parser_combinators"]["sha256"],
+        artifact_sha256 = scala_version_extra_jars["scala_parser_combinators"]["sha256"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -479,7 +479,7 @@ def scala_repositories(
     _scala_maven_import_external(
         name = "scalac_rules_commons_io",
         artifact = "commons-io:commons-io:2.6",
-        jar_sha256 = "f877d304660ac2a142f3865badfc971dec7ed73c747c7f8d5d2f5139ca736513",
+        artifact_sha256 = "f877d304660ac2a142f3865badfc971dec7ed73c747c7f8d5d2f5139ca736513",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -487,7 +487,7 @@ def scala_repositories(
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_guava",
         artifact = "com.google.guava:guava:21.0",
-        jar_sha256 = "972139718abc8a4893fa78cba8cf7b2c903f35c97aaf44fa3031b0669948b480",
+        artifact_sha256 = "972139718abc8a4893fa78cba8cf7b2c903f35c97aaf44fa3031b0669948b480",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/scala/scala_cross_version.bzl b/scala/scala_cross_version.bzl
index acdec8421..f8646db1d 100644
--- a/scala/scala_cross_version.bzl
+++ b/scala/scala_cross_version.bzl
@@ -60,21 +60,21 @@ def new_scala_default_repository(
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_scala_library",
         artifact = "org.scala-lang:scala-library:{}".format(scala_version),
-        jar_sha256 = scala_version_jar_shas["scala_library"],
+        artifact_sha256 = scala_version_jar_shas["scala_library"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_scala_compiler",
         artifact = "org.scala-lang:scala-compiler:{}".format(scala_version),
-        jar_sha256 = scala_version_jar_shas["scala_compiler"],
+        artifact_sha256 = scala_version_jar_shas["scala_compiler"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
     _scala_maven_import_external(
         name = "io_bazel_rules_scala_scala_reflect",
         artifact = "org.scala-lang:scala-reflect:{}".format(scala_version),
-        jar_sha256 = scala_version_jar_shas["scala_reflect"],
+        artifact_sha256 = scala_version_jar_shas["scala_reflect"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/scala/scala_maven_import_external.bzl b/scala/scala_maven_import_external.bzl
index 0c2dda477..bfe94c54b 100644
--- a/scala/scala_maven_import_external.bzl
+++ b/scala/scala_maven_import_external.bzl
@@ -382,7 +382,7 @@ java_import_external(
         "http://repo1.maven.org/maven2/com/google/guava/guava/20.0/guava-20.0.jar",
         "http://maven.ibiblio.org/maven2/com/google/guava/guava/20.0/guava-20.0.jar",
     ],
-    jar_sha256 = "36a666e3b71ae7f0f0dca23654b67e086e6c93d192f60ba5dfd5519db6c288c8",
+    artifact_sha256 = "36a666e3b71ae7f0f0dca23654b67e086e6c93d192f60ba5dfd5519db6c288c8",
     deps = [
         "@com_google_code_findbugs_jsr305",
         "@com_google_errorprone_error_prone_annotations",
@@ -397,13 +397,13 @@ java_import_external(
         "http://repo1.maven.org/maven2/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar",
         "http://maven.ibiblio.org/maven2/com/google/code/findbugs/jsr305/1.3.9/jsr305-1.3.9.jar",
     ],
-    jar_sha256 = "905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed",
+    artifact_sha256 = "905721a0eea90a81534abb7ee6ef4ea2e5e645fa1def0a5cd88402df1b46c9ed",
 )
 
 java_import_external(
     name = "com_google_errorprone_error_prone_annotations",
     licenses = ["notice"],  # Apache 2.0
-    jar_sha256 = "e7749ffdf03fb8ebe08a727ea205acb301c8791da837fee211b99b04f9d79c46",
+    artifact_sha256 = "e7749ffdf03fb8ebe08a727ea205acb301c8791da837fee211b99b04f9d79c46",
     jar_urls = [
         "http://bazel-mirror.storage.googleapis.com/repo1.maven.org/maven2/com/google/errorprone/error_prone_annotations/2.0.15/error_prone_annotations-2.0.15.jar",
         "http://maven.ibiblio.org/maven2/com/google/errorprone/error_prone_annotations/2.0.15/error_prone_annotations-2.0.15.jar",
@@ -440,9 +440,8 @@ will be loaded into a runtime environment where certain dependencies can be
 reasonably expected to already be provided.
 """
 
-def java_import_external(jar_sha256, **kwargs):
+def java_import_external(**kwargs):
     jvm_import_external(
         rule_name = "java_import",
-        jar_sha256 = jar_sha256,
         **kwargs
     )
diff --git a/scala_proto/private/scala_proto_default_repositories.bzl b/scala_proto/private/scala_proto_default_repositories.bzl
index 5b8ce0131..2b95ce959 100644
--- a/scala_proto/private/scala_proto_default_repositories.bzl
+++ b/scala_proto/private/scala_proto_default_repositories.bzl
@@ -43,7 +43,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:compilerplugin:0.8.4",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapb_plugin"],
+        artifact_sha256 = scala_version_jar_shas["scalapb_plugin"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -59,7 +59,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:protoc-bridge:0.7.3",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["protoc_bridge"],
+        artifact_sha256 = scala_version_jar_shas["protoc_bridge"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -75,7 +75,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:scalapbc:0.8.4",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapbc"],
+        artifact_sha256 = scala_version_jar_shas["scalapbc"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -90,7 +90,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:scalapb-runtime:0.8.4",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapb_runtime"],
+        artifact_sha256 = scala_version_jar_shas["scalapb_runtime"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -105,7 +105,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:scalapb-runtime-grpc:0.8.4",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapb_runtime_grpc"],
+        artifact_sha256 = scala_version_jar_shas["scalapb_runtime_grpc"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -120,7 +120,7 @@ def scala_proto_default_repositories(
             "com.thesamet.scalapb:lenses:0.8.4",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapb_lenses"],
+        artifact_sha256 = scala_version_jar_shas["scalapb_lenses"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -135,7 +135,7 @@ def scala_proto_default_repositories(
             "com.lihaoyi:fastparse:1.0.0",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scalapb_fastparse"],
+        artifact_sha256 = scala_version_jar_shas["scalapb_fastparse"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -148,7 +148,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_grpc_core",
         artifact = "io.grpc:grpc-core:1.19.0",
-        jar_sha256 = "3cfaae2db268e4da2609079cecade8434afcb7ab23a126a57d870b722b2b6ab9",
+        artifact_sha256 = "3cfaae2db268e4da2609079cecade8434afcb7ab23a126a57d870b722b2b6ab9",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -161,7 +161,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_grpc_stub",
         artifact = "io.grpc:grpc-stub:1.19.0",
-        jar_sha256 = "711dad5734b4e8602a271cb383eda504d6d1bf5385ced045a0ca91176ae73821",
+        artifact_sha256 = "711dad5734b4e8602a271cb383eda504d6d1bf5385ced045a0ca91176ae73821",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -174,7 +174,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_grpc_protobuf",
         artifact = "io.grpc:grpc-protobuf:1.19.0",
-        jar_sha256 = "37e50ab7de4a50db4c9f9a2f095ffc51df49e36c9ab7fffb1f3ad20ab6f47022",
+        artifact_sha256 = "37e50ab7de4a50db4c9f9a2f095ffc51df49e36c9ab7fffb1f3ad20ab6f47022",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -187,7 +187,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_grpc_netty",
         artifact = "io.grpc:grpc-netty:1.19.0",
-        jar_sha256 = "08604191fa77ef644cd9d7323d633333eceb800831805395a21b5c8e7d02caf0",
+        artifact_sha256 = "08604191fa77ef644cd9d7323d633333eceb800831805395a21b5c8e7d02caf0",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -200,7 +200,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_grpc_context",
         artifact = "io.grpc:grpc-context:1.19.0",
-        jar_sha256 = "8f4df8618c500f3c1fdf88b755caeb14fe2846ea59a9e762f614852178b64318",
+        artifact_sha256 = "8f4df8618c500f3c1fdf88b755caeb14fe2846ea59a9e762f614852178b64318",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -215,7 +215,7 @@ def scala_proto_default_repositories(
         # io.grpc:grpc-core:1.19.0 defines a dependency on guava 26.0-android
         # see https://search.maven.org/artifact/io.grpc/grpc-core/1.19.0/jar
         artifact = "com.google.guava:guava:26.0-android",
-        jar_sha256 = "1d044ebb866ef08b7d04e998b4260c9b52fab6e6d6b68d207859486bb3686cd5",
+        artifact_sha256 = "1d044ebb866ef08b7d04e998b4260c9b52fab6e6d6b68d207859486bb3686cd5",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -228,7 +228,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_google_instrumentation",
         artifact = "com.google.instrumentation:instrumentation-api:0.3.0",
-        jar_sha256 = "671f7147487877f606af2c7e39399c8d178c492982827305d3b1c7f5b04f1145",
+        artifact_sha256 = "671f7147487877f606af2c7e39399c8d178c492982827305d3b1c7f5b04f1145",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -241,7 +241,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_codec",
         artifact = "io.netty:netty-codec:4.1.32.Final",
-        jar_sha256 = "dbd6cea7d7bf5a2604e87337cb67c9468730d599be56511ed0979aacb309f879",
+        artifact_sha256 = "dbd6cea7d7bf5a2604e87337cb67c9468730d599be56511ed0979aacb309f879",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -254,7 +254,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_codec_http",
         artifact = "io.netty:netty-codec-http:4.1.32.Final",
-        jar_sha256 = "db2c22744f6a4950d1817e4e1a26692e53052c5d54abe6cceecd7df33f4eaac3",
+        artifact_sha256 = "db2c22744f6a4950d1817e4e1a26692e53052c5d54abe6cceecd7df33f4eaac3",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -267,7 +267,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_codec_socks",
         artifact = "io.netty:netty-codec-socks:4.1.32.Final",
-        jar_sha256 = "fe2f2e97d6c65dc280623dcfd24337d8a5c7377049c120842f2c59fb83d7408a",
+        artifact_sha256 = "fe2f2e97d6c65dc280623dcfd24337d8a5c7377049c120842f2c59fb83d7408a",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -280,7 +280,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_codec_http2",
         artifact = "io.netty:netty-codec-http2:4.1.32.Final",
-        jar_sha256 = "4d4c6cfc1f19efb969b9b0ae6cc977462d202867f7dcfee6e9069977e623a2f5",
+        artifact_sha256 = "4d4c6cfc1f19efb969b9b0ae6cc977462d202867f7dcfee6e9069977e623a2f5",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -293,7 +293,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_handler",
         artifact = "io.netty:netty-handler:4.1.32.Final",
-        jar_sha256 = "07d9756e48b5f6edc756e33e8b848fb27ff0b1ae087dab5addca6c6bf17cac2d",
+        artifact_sha256 = "07d9756e48b5f6edc756e33e8b848fb27ff0b1ae087dab5addca6c6bf17cac2d",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -306,7 +306,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_buffer",
         artifact = "io.netty:netty-buffer:4.1.32.Final",
-        jar_sha256 = "8ac0e30048636bd79ae205c4f9f5d7544290abd3a7ed39d8b6d97dfe3795afc1",
+        artifact_sha256 = "8ac0e30048636bd79ae205c4f9f5d7544290abd3a7ed39d8b6d97dfe3795afc1",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -319,7 +319,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_transport",
         artifact = "io.netty:netty-transport:4.1.32.Final",
-        jar_sha256 = "175bae0d227d7932c0c965c983efbb3cf01f39abe934f5c4071d0319784715fb",
+        artifact_sha256 = "175bae0d227d7932c0c965c983efbb3cf01f39abe934f5c4071d0319784715fb",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -332,7 +332,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_resolver",
         artifact = "io.netty:netty-resolver:4.1.32.Final",
-        jar_sha256 = "9b4a19982047a95ea4791a7ad7ad385c7a08c2ac75f0a3509cc213cb32a726ae",
+        artifact_sha256 = "9b4a19982047a95ea4791a7ad7ad385c7a08c2ac75f0a3509cc213cb32a726ae",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -345,7 +345,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_common",
         artifact = "io.netty:netty-common:4.1.32.Final",
-        jar_sha256 = "cc993e660f8f8e3b033f1d25a9e2f70151666bdf878d460a6508cb23daa696dc",
+        artifact_sha256 = "cc993e660f8f8e3b033f1d25a9e2f70151666bdf878d460a6508cb23daa696dc",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -358,7 +358,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_netty_handler_proxy",
         artifact = "io.netty:netty-handler-proxy:4.1.32.Final",
-        jar_sha256 = "10d1081ed114bb0e76ebbb5331b66a6c3189cbdefdba232733fc9ca308a6ea34",
+        artifact_sha256 = "10d1081ed114bb0e76ebbb5331b66a6c3189cbdefdba232733fc9ca308a6ea34",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -371,7 +371,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_opencensus_api",
         artifact = "io.opencensus:opencensus-api:0.22.1",
-        jar_sha256 = "62a0503ee81856ba66e3cde65dee3132facb723a4fa5191609c84ce4cad36127",
+        artifact_sha256 = "62a0503ee81856ba66e3cde65dee3132facb723a4fa5191609c84ce4cad36127",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -384,7 +384,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_opencensus_impl",
         artifact = "io.opencensus:opencensus-impl:0.22.1",
-        jar_sha256 = "9e8b209da08d1f5db2b355e781b9b969b2e0dab934cc806e33f1ab3baed4f25a",
+        artifact_sha256 = "9e8b209da08d1f5db2b355e781b9b969b2e0dab934cc806e33f1ab3baed4f25a",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -397,7 +397,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_disruptor",
         artifact = "com.lmax:disruptor:3.4.2",
-        jar_sha256 = "f412ecbb235c2460b45e63584109723dea8d94b819c78c9bfc38f50cba8546c0",
+        artifact_sha256 = "f412ecbb235c2460b45e63584109723dea8d94b819c78c9bfc38f50cba8546c0",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -410,7 +410,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_opencensus_impl_core",
         artifact = "io.opencensus:opencensus-impl-core:0.22.1",
-        jar_sha256 = "04607d100e34bacdb38f93c571c5b7c642a1a6d873191e25d49899668514db68",
+        artifact_sha256 = "04607d100e34bacdb38f93c571c5b7c642a1a6d873191e25d49899668514db68",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -423,7 +423,7 @@ def scala_proto_default_repositories(
     _scala_maven_import_external(
         name = "scala_proto_rules_opencensus_contrib_grpc_metrics",
         artifact = "io.opencensus:opencensus-contrib-grpc-metrics:0.22.1",
-        jar_sha256 = "3f6f4d5bd332c516282583a01a7c940702608a49ed6e62eb87ef3b1d320d144b",
+        artifact_sha256 = "3f6f4d5bd332c516282583a01a7c940702608a49ed6e62eb87ef3b1d320d144b",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/specs2/specs2.bzl b/specs2/specs2.bzl
index 3351fe633..769a4d5d5 100644
--- a/specs2/specs2.bzl
+++ b/specs2/specs2.bzl
@@ -40,7 +40,7 @@ def specs2_repositories(
             "org.specs2:specs2-common:" + specs2_version(),
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["specs2_common"],
+        artifact_sha256 = scala_version_jar_shas["specs2_common"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -51,7 +51,7 @@ def specs2_repositories(
             "org.specs2:specs2-core:" + specs2_version(),
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["specs2_core"],
+        artifact_sha256 = scala_version_jar_shas["specs2_core"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -62,7 +62,7 @@ def specs2_repositories(
             "org.specs2:specs2-fp:" + specs2_version(),
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["specs2_fp"],
+        artifact_sha256 = scala_version_jar_shas["specs2_fp"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -73,7 +73,7 @@ def specs2_repositories(
             "org.specs2:specs2-matcher:" + specs2_version(),
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["specs2_matcher"],
+        artifact_sha256 = scala_version_jar_shas["specs2_matcher"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/specs2/specs2_junit.bzl b/specs2/specs2_junit.bzl
index 46c4678c3..813f3297c 100644
--- a/specs2/specs2_junit.bzl
+++ b/specs2/specs2_junit.bzl
@@ -40,7 +40,7 @@ def specs2_junit_repositories(
             "org.specs2:specs2-junit:" + specs2_version(),
             major_version,
         ),
-        jar_sha256 = scala_jar_shas[major_version]["specs2_junit"],
+        artifact_sha256 = scala_jar_shas[major_version]["specs2_junit"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
diff --git a/tut_rule/tut.bzl b/tut_rule/tut.bzl
index 6ed38c5bf..c2e10d318 100644
--- a/tut_rule/tut.bzl
+++ b/tut_rule/tut.bzl
@@ -30,7 +30,7 @@ def tut_repositories(
             "org.tpolecat:tut-core:0.4.8",
             major_version,
         ),
-        jar_sha256 = scala_jar_shas[major_version]["tut_core"],
+        artifact_sha256 = scala_jar_shas[major_version]["tut_core"],
         licenses = ["notice"],
         server_urls = server_urls,
     )
diff --git a/twitter_scrooge/twitter_scrooge.bzl b/twitter_scrooge/twitter_scrooge.bzl
index 41a99b2c2..c5a5016f6 100644
--- a/twitter_scrooge/twitter_scrooge.bzl
+++ b/twitter_scrooge/twitter_scrooge.bzl
@@ -29,7 +29,7 @@ def twitter_scrooge(
     _scala_maven_import_external(
         name = "libthrift",
         artifact = "org.apache.thrift:libthrift:0.8.0",
-        jar_sha256 = "adea029247c3f16e55e29c1708b897812fd1fe335ac55fe3903e5d2f428ef4b3",
+        artifact_sha256 = "adea029247c3f16e55e29c1708b897812fd1fe335ac55fe3903e5d2f428ef4b3",
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -61,7 +61,7 @@ def twitter_scrooge(
             "com.twitter:scrooge-core:18.6.0",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scrooge_core"],
+        artifact_sha256 = scala_version_jar_shas["scrooge_core"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -77,7 +77,7 @@ def twitter_scrooge(
             "com.twitter:scrooge-generator:18.6.0",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["scrooge_generator"],
+        artifact_sha256 = scala_version_jar_shas["scrooge_generator"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -92,7 +92,7 @@ def twitter_scrooge(
             "com.twitter:util-core:18.6.0",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["util_core"],
+        artifact_sha256 = scala_version_jar_shas["util_core"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )
@@ -107,7 +107,7 @@ def twitter_scrooge(
             "com.twitter:util-logging:18.6.0",
             major_version,
         ),
-        jar_sha256 = scala_version_jar_shas["util_logging"],
+        artifact_sha256 = scala_version_jar_shas["util_logging"],
         licenses = ["notice"],
         server_urls = maven_servers,
     )