diff --git a/pkgs/build-support/fetchmavenartifact/default.nix b/pkgs/build-support/fetchmavenartifact/default.nix
index 42ad7603a8f..42162638e72 100644
--- a/pkgs/build-support/fetchmavenartifact/default.nix
+++ b/pkgs/build-support/fetchmavenartifact/default.nix
@@ -3,10 +3,10 @@
 { fetchurl, stdenv }:
 let
   defaultRepos = [
-    "http://repo1.maven.org/maven2"
-    "http://oss.sonatype.org/content/repositories/releases"
-    "http://oss.sonatype.org/content/repositories/public"
-    "http://repo.typesafe.com/typesafe/releases"
+    "https://repo1.maven.org/maven2"
+    "https://oss.sonatype.org/content/repositories/releases"
+    "https://oss.sonatype.org/content/repositories/public"
+    "https://repo.typesafe.com/typesafe/releases"
   ];
 in
 
@@ -50,7 +50,7 @@ let
       (replaceChars ["."] ["/"] groupId)
       artifactId
       version
-      "${artifactId}-${version}-${optionalString (!isNull classifier) "-${classifier}"}.jar"
+      "${artifactId}-${version}${optionalString (!isNull classifier) "-${classifier}"}.jar"
     ];
   urls_ =
     if url != "" then [url]
diff --git a/pkgs/development/interpreters/clojurescript/lumo/deps.nix b/pkgs/development/interpreters/clojurescript/lumo/deps.nix
index 4f3beff3b81..50f1c4af211 100644
--- a/pkgs/development/interpreters/clojurescript/lumo/deps.nix
+++ b/pkgs/development/interpreters/clojurescript/lumo/deps.nix
@@ -4,9 +4,9 @@
 let repos = [
       "https://repo.clojars.org/"
       "https://repo1.maven.org/"
-      "http://oss.sonatype.org/content/repositories/releases/"
-      "http://oss.sonatype.org/content/repositories/public/"
-      "http://repo.typesafe.com/typesafe/releases/"
+      "https://oss.sonatype.org/content/repositories/releases/"
+      "https://oss.sonatype.org/content/repositories/public/"
+      "https://repo.typesafe.com/typesafe/releases/"
     ];
 
 in rec {