diff --git a/pkgs/by-name/by/byacc/package.nix b/pkgs/by-name/by/byacc/package.nix
index efb7dc07077dc..8da6559f602b0 100644
--- a/pkgs/by-name/by/byacc/package.nix
+++ b/pkgs/by-name/by/byacc/package.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchurl {
     urls = [
       "https://invisible-mirror.net/archives/byacc/byacc-${finalAttrs.version}.tgz"
-      "ftp://ftp.invisible-island.net/byacc/byacc-${finalAttrs.version}.tgz"
+      "https://invisible-island.net/archives/byacc/byacc-${finalAttrs.version}.tgz"
     ];
     hash = "sha256-GSwvrgSNTn9RS6RRYn+cTmEnZQmfgZwZGR+f3j5glnM=";
   };
diff --git a/pkgs/by-name/cp/cproto/package.nix b/pkgs/by-name/cp/cproto/package.nix
index 257bba7420d57..4dc9a1c1d3641 100644
--- a/pkgs/by-name/cp/cproto/package.nix
+++ b/pkgs/by-name/cp/cproto/package.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation rec {
     urls = [
       "mirror://debian/pool/main/c/cproto/cproto_${version}.orig.tar.gz"
       # No version listings and apparently no versioned tarball over http(s).
-      "ftp://ftp.invisible-island.net/cproto/cproto-${version}.tgz"
+      "https://invisible-island.net/archives/cproto/cproto-${version}.tgz"
     ];
     sha256 = "sha256-C9HYvo/wpMpD+Uf5V1DTT2TtqTyeLKeRAP1gFAt8YzE=";
   };
diff --git a/pkgs/by-name/di/diffstat/package.nix b/pkgs/by-name/di/diffstat/package.nix
index 3744d3da2a2eb..7aa1b6e3ed81e 100644
--- a/pkgs/by-name/di/diffstat/package.nix
+++ b/pkgs/by-name/di/diffstat/package.nix
@@ -12,7 +12,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     urls = [
-      "ftp://ftp.invisible-island.net/diffstat/diffstat-${version}.tgz"
+      "https://invisible-island.net/archives/diffstat/diffstat-${version}.tgz"
       "https://invisible-mirror.net/archives/diffstat/diffstat-${version}.tgz"
     ];
     hash = "sha256-ifkpSorHT8728bmsQI9D6+340gjj7+C5m0rMFtxlgsc=";
diff --git a/pkgs/by-name/ly/lynx/package.nix b/pkgs/by-name/ly/lynx/package.nix
index d4b6bd227292a..2ec3cab0c39dc 100644
--- a/pkgs/by-name/ly/lynx/package.nix
+++ b/pkgs/by-name/ly/lynx/package.nix
@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     urls = [
-      "ftp://ftp.invisible-island.net/lynx/tarballs/lynx${version}.tar.bz2"
+      "https://invisible-island.net/archives/lynx/tarballs/lynx${version}.tar.bz2"
       "https://invisible-mirror.net/archives/lynx/tarballs/lynx${version}.tar.bz2"
     ];
     hash = "sha256-c3S4mTbZkWaeEB9Ol/LJWSA24ejNqnuvwlmnerb7B84=";
diff --git a/pkgs/by-name/ma/mawk/package.nix b/pkgs/by-name/ma/mawk/package.nix
index 020435e7a420e..7de0684d118c3 100644
--- a/pkgs/by-name/ma/mawk/package.nix
+++ b/pkgs/by-name/ma/mawk/package.nix
@@ -14,7 +14,7 @@ stdenv.mkDerivation (finalAttrs: {
   src = fetchurl {
     urls = [
       "https://invisible-mirror.net/archives/mawk/mawk-${finalAttrs.version}.tgz"
-      "ftp://ftp.invisible-island.net/mawk/mawk-${finalAttrs.version}.tgz"
+      "https://invisible-island.net/archives/mawk/mawk-${finalAttrs.version}.tgz"
     ];
     hash = "sha256-bh/ejuetilwVOCMWhj/WtMbSP6t4HdWrAXf/o+6arlw=";
   };
diff --git a/pkgs/by-name/vt/vttest/package.nix b/pkgs/by-name/vt/vttest/package.nix
index ae713db4afe29..ac4ce1c4e4a8b 100644
--- a/pkgs/by-name/vt/vttest/package.nix
+++ b/pkgs/by-name/vt/vttest/package.nix
@@ -11,7 +11,7 @@ stdenv.mkDerivation rec {
   src = fetchurl {
     urls = [
       "https://invisible-mirror.net/archives/vttest/vttest-${version}.tgz"
-      "ftp://ftp.invisible-island.net/vttest/vttest-${version}.tgz"
+      "https://invisible-island.net/archives/vttest/vttest-${version}.tgz"
     ];
     sha256 = "sha256-j+47rH6H1KpKIXvSs4q5kQw7jPmmBbRQx2zMCtKmUZ0=";
   };
diff --git a/pkgs/by-name/xt/xterm/package.nix b/pkgs/by-name/xt/xterm/package.nix
index 739467e30cc45..1503f24327887 100644
--- a/pkgs/by-name/xt/xterm/package.nix
+++ b/pkgs/by-name/xt/xterm/package.nix
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     urls = [
-      "ftp://ftp.invisible-island.net/xterm/${pname}-${version}.tgz"
+      "https://invisible-island.net/archives/xterm/${pname}-${version}.tgz"
       "https://invisible-mirror.net/archives/xterm/${pname}-${version}.tgz"
     ];
     hash = "sha256-YzMvkhwie6WeWJ+gff2tFZnBCshZ6ibHKsHdSkG1ZaQ=";