diff --git a/packages/rpc-core/src/util/refCountDelay.ts b/packages/rpc-core/src/util/refCountDelay.ts
index 15281c3b87..721855a28f 100644
--- a/packages/rpc-core/src/util/refCountDelay.ts
+++ b/packages/rpc-core/src/util/refCountDelay.ts
@@ -1,7 +1,9 @@
 // Copyright 2017-2020 @polkadot/rpc-core authors & contributors
 // SPDX-License-Identifier: Apache-2.0
 
-import { asapScheduler, ConnectableObservable, MonoTypeOperatorFunction, Observable, Subscription, TeardownLogic } from '@polkadot/x-rxjs';
+import type { ConnectableObservable, MonoTypeOperatorFunction, TeardownLogic } from '@polkadot/x-rxjs';
+
+import { asapScheduler, Observable, Subscription } from '@polkadot/x-rxjs';
 
 /** @internal */
 export function refCountDelay <T> (delay = 1750): MonoTypeOperatorFunction<T> {
diff --git a/packages/x-rxjs/.skip-esm b/packages/x-rxjs/.skip-esm
deleted file mode 100644
index e69de29bb2..0000000000
diff --git a/packages/x-rxjs/src/index.ts b/packages/x-rxjs/src/index.d.ts
similarity index 100%
rename from packages/x-rxjs/src/index.ts
rename to packages/x-rxjs/src/index.d.ts
diff --git a/packages/x-rxjs/src/index.js b/packages/x-rxjs/src/index.js
new file mode 100644
index 0000000000..d5a90adcef
--- /dev/null
+++ b/packages/x-rxjs/src/index.js
@@ -0,0 +1,71 @@
+// Copyright 2017-2020 @polkadot/x-rxjs authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// This is not great, but while having esm files, rxjs doesn't quite play nicely with
+// Node.js mjs files. (Hopefully this improves in 7.0, although no exports map as of yet)
+//
+// Generated via s/export \{ (.*) \} from .*/exports.$1 = rxjs.$1;/ on rxjs/_esm
+
+const rxjs = require('rxjs');
+
+exports.Observable = rxjs.Observable;
+exports.ConnectableObservable = rxjs.ConnectableObservable;
+exports.GroupedObservable = rxjs.GroupedObservable;
+exports.observable = rxjs.observable;
+exports.Subject = rxjs.Subject;
+exports.BehaviorSubject = rxjs.BehaviorSubject;
+exports.ReplaySubject = rxjs.ReplaySubject;
+exports.AsyncSubject = rxjs.AsyncSubject;
+exports.asap = rxjs.asap;
+exports.asapScheduler = rxjs.asapScheduler;
+exports.async = rxjs.async;
+exports.asyncScheduler = rxjs.asyncScheduler;
+exports.queue = rxjs.queue;
+exports.queueScheduler = rxjs.queueScheduler;
+exports.animationFrame = rxjs.animationFrame;
+exports.animationFrameScheduler = rxjs.animationFrameScheduler;
+exports.VirtualTimeScheduler = rxjs.VirtualTimeScheduler;
+exports.VirtualAction = rxjs.VirtualAction;
+exports.Scheduler = rxjs.Scheduler;
+exports.Subscription = rxjs.Subscription;
+exports.Subscriber = rxjs.Subscriber;
+exports.Notification = rxjs.Notification;
+exports.NotificationKind = rxjs.NotificationKind;
+exports.pipe = rxjs.pipe;
+exports.noop = rxjs.noop;
+exports.identity = rxjs.identity;
+exports.isObservable = rxjs.isObservable;
+exports.ArgumentOutOfRangeError = rxjs.ArgumentOutOfRangeError;
+exports.EmptyError = rxjs.EmptyError;
+exports.ObjectUnsubscribedError = rxjs.ObjectUnsubscribedError;
+exports.UnsubscriptionError = rxjs.UnsubscriptionError;
+exports.TimeoutError = rxjs.TimeoutError;
+exports.bindCallback = rxjs.bindCallback;
+exports.bindNodeCallback = rxjs.bindNodeCallback;
+exports.combineLatest = rxjs.combineLatest;
+exports.concat = rxjs.concat;
+exports.defer = rxjs.defer;
+exports.empty = rxjs.empty;
+exports.forkJoin = rxjs.forkJoin;
+exports.from = rxjs.from;
+exports.fromEvent = rxjs.fromEvent;
+exports.fromEventPattern = rxjs.fromEventPattern;
+exports.generate = rxjs.generate;
+exports.iif = rxjs.iif;
+exports.interval = rxjs.interval;
+exports.merge = rxjs.merge;
+exports.never = rxjs.never;
+exports.of = rxjs.of;
+exports.onErrorResumeNext = rxjs.onErrorResumeNext;
+exports.pairs = rxjs.pairs;
+exports.partition = rxjs.partition;
+exports.race = rxjs.race;
+exports.range = rxjs.range;
+exports.throwError = rxjs.throwError;
+exports.timer = rxjs.timer;
+exports.using = rxjs.using;
+exports.zip = rxjs.zip;
+exports.scheduled = rxjs.scheduled;
+exports.EMPTY = rxjs.EMPTY;
+exports.NEVER = rxjs.NEVER;
+exports.config = rxjs.config;
diff --git a/packages/x-rxjs/src/operators.ts b/packages/x-rxjs/src/operators.d.ts
similarity index 100%
rename from packages/x-rxjs/src/operators.ts
rename to packages/x-rxjs/src/operators.d.ts
diff --git a/packages/x-rxjs/src/operators.js b/packages/x-rxjs/src/operators.js
new file mode 100644
index 0000000000..615dca9d27
--- /dev/null
+++ b/packages/x-rxjs/src/operators.js
@@ -0,0 +1,114 @@
+// Copyright 2017-2020 @polkadot/x-rxjs authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+// This is not great, but while having esm files, rxjs doesn't quite play nicely with
+// Node.js mjs files. (Hopefully this improves in 7.0, although no exports map as of yet)
+//
+// Generated via s/export \{ (.*) \} from .*/exports.$1 = rxjs.$1;/ on rxjs/_esm
+
+const operators = require('rxjs/operators');
+
+exports.audit = operators.audit;
+exports.auditTime = operators.auditTime;
+exports.buffer = operators.buffer;
+exports.bufferCount = operators.bufferCount;
+exports.bufferTime = operators.bufferTime;
+exports.bufferToggle = operators.bufferToggle;
+exports.bufferWhen = operators.bufferWhen;
+exports.catchError = operators.catchError;
+exports.combineAll = operators.combineAll;
+exports.combineLatest = operators.combineLatest;
+exports.concat = operators.concat;
+exports.concatAll = operators.concatAll;
+exports.concatMap = operators.concatMap;
+exports.concatMapTo = operators.concatMapTo;
+exports.count = operators.count;
+exports.debounce = operators.debounce;
+exports.debounceTime = operators.debounceTime;
+exports.defaultIfEmpty = operators.defaultIfEmpty;
+exports.delay = operators.delay;
+exports.delayWhen = operators.delayWhen;
+exports.dematerialize = operators.dematerialize;
+exports.distinct = operators.distinct;
+exports.distinctUntilChanged = operators.distinctUntilChanged;
+exports.distinctUntilKeyChanged = operators.distinctUntilKeyChanged;
+exports.elementAt = operators.elementAt;
+exports.endWith = operators.endWith;
+exports.every = operators.every;
+exports.exhaust = operators.exhaust;
+exports.exhaustMap = operators.exhaustMap;
+exports.expand = operators.expand;
+exports.filter = operators.filter;
+exports.finalize = operators.finalize;
+exports.find = operators.find;
+exports.findIndex = operators.findIndex;
+exports.first = operators.first;
+exports.groupBy = operators.groupBy;
+exports.ignoreElements = operators.ignoreElements;
+exports.isEmpty = operators.isEmpty;
+exports.last = operators.last;
+exports.map = operators.map;
+exports.mapTo = operators.mapTo;
+exports.materialize = operators.materialize;
+exports.max = operators.max;
+exports.merge = operators.merge;
+exports.mergeAll = operators.mergeAll;
+exports.mergeMap = operators.mergeMap;
+exports.flatMap = operators.flatMap;
+exports.mergeMapTo = operators.mergeMapTo;
+exports.mergeScan = operators.mergeScan;
+exports.min = operators.min;
+exports.multicast = operators.multicast;
+exports.observeOn = operators.observeOn;
+exports.onErrorResumeNext = operators.onErrorResumeNext;
+exports.pairwise = operators.pairwise;
+exports.partition = operators.partition;
+exports.pluck = operators.pluck;
+exports.publish = operators.publish;
+exports.publishBehavior = operators.publishBehavior;
+exports.publishLast = operators.publishLast;
+exports.publishReplay = operators.publishReplay;
+exports.race = operators.race;
+exports.reduce = operators.reduce;
+exports.repeat = operators.repeat;
+exports.repeatWhen = operators.repeatWhen;
+exports.retry = operators.retry;
+exports.retryWhen = operators.retryWhen;
+exports.refCount = operators.refCount;
+exports.sample = operators.sample;
+exports.sampleTime = operators.sampleTime;
+exports.scan = operators.scan;
+exports.sequenceEqual = operators.sequenceEqual;
+exports.share = operators.share;
+exports.shareReplay = operators.shareReplay;
+exports.single = operators.single;
+exports.skip = operators.skip;
+exports.skipLast = operators.skipLast;
+exports.skipUntil = operators.skipUntil;
+exports.skipWhile = operators.skipWhile;
+exports.startWith = operators.startWith;
+exports.subscribeOn = operators.subscribeOn;
+exports.switchAll = operators.switchAll;
+exports.switchMap = operators.switchMap;
+exports.switchMapTo = operators.switchMapTo;
+exports.take = operators.take;
+exports.takeLast = operators.takeLast;
+exports.takeUntil = operators.takeUntil;
+exports.takeWhile = operators.takeWhile;
+exports.tap = operators.tap;
+exports.throttle = operators.throttle;
+exports.throttleTime = operators.throttleTime;
+exports.throwIfEmpty = operators.throwIfEmpty;
+exports.timeInterval = operators.timeInterval;
+exports.timeout = operators.timeout;
+exports.timeoutWith = operators.timeoutWith;
+exports.timestamp = operators.timestamp;
+exports.toArray = operators.toArray;
+exports.window = operators.window;
+exports.windowCount = operators.windowCount;
+exports.windowTime = operators.windowTime;
+exports.windowToggle = operators.windowToggle;
+exports.windowWhen = operators.windowWhen;
+exports.withLatestFrom = operators.withLatestFrom;
+exports.zip = operators.zip;
+exports.zipAll = operators.zipAll;