diff --git a/gnu/packages/qt.scm b/gnu/packages/qt.scm
index 79d41b3e73..96a28ceb29 100644
--- a/gnu/packages/qt.scm
+++ b/gnu/packages/qt.scm
@@ -1,7 +1,7 @@
 ;;; GNU Guix --- Functional package management for GNU
 ;;; Copyright © 2013, 2014, 2015 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
-;;; Copyright © 2015, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2015, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2015, 2016, 2017, 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
 ;;; Copyright © 2016, 2017 Nikita <nikita@n0.is>
 ;;; Copyright © 2016 Thomas Danckaert <post@thomasdanckaert.be>
@@ -343,16 +343,31 @@ (define-public qt-4
     ;; Qt 5: assembler error; see <http://hydra.gnu.org/build/112526>.
     (supported-systems (delete "mips64el-linux" %supported-systems))))
 
+(define (qt5-urls component version)
+  "Return a list of URLs for VERSION of the Qt5 COMPONENT."
+  ;; We can't use a mirror:// scheme because these URLs are not exact copies:
+  ;; the layout differs between them.
+  (list (string-append "https://download.qt.io/official_releases/qt/"
+                       (version-major+minor version) "/" version
+                       "/submodules/" component "-everywhere-src-"
+                       version ".tar.xz")
+        (string-append "https://download.qt.io/archive/qt/"
+                       (version-major+minor version) "/" version
+                       "/submodules/" component "-everywhere-src-"
+                       version ".tar.xz")
+        (let ((directory (string-append "qt5" (string-drop component 2))))
+          (string-append "http://sources.buildroot.net/" directory "/"
+                         component "-everywhere-src-" version ".tar.xz"))
+        (string-append "https://distfiles.macports.org/qt5/"
+                       component "-everywhere-src-" version ".tar.xz")))
+
 (define-public qtbase
   (package
     (name "qtbase")
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "12mjsahlma9rw3vz9a6b5h2s6ylg8b34hxc2vnlna5ll429fgfa8"))
@@ -611,10 +626,7 @@ (define-public qtsvg
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "18dmfc8s428fzbk7k5vl3212b25455ayrz7s716nwyiy3ahgmmy7"))))
@@ -686,10 +698,7 @@ (define-public qtimageformats
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "132g4rlm61pdcpcrclr1rwpbrxn7va4wjfb021mh8pn1cl0wlgkk"))
@@ -727,10 +736,7 @@ (define-public qtx11extras
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0njlh6d327nll7d8qaqrwr5x15m9yzgyar2j45qigs1f7ah896my"))))
@@ -751,10 +757,7 @@ (define-public qtxmlpatterns
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1dyg1z4349k04yyzn8xbp4f5qjgm60gz6wgzp80khpilcmk8g6i1"))))
@@ -782,10 +785,7 @@ (define-public qtdeclarative
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0l0nhc2si6dl9r4s1bs45z90qqigs8jnrsyjjdy38q4pvix63i53"))))
@@ -826,10 +826,7 @@ (define-public qtconnectivity
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0a5wzin635b926b8prdwfazgy1vhyf8m6an64wp2lpkp78z7prmb"))))
@@ -850,10 +847,7 @@ (define-public qtwebsockets
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "116amx4mnv50k0fpswgpr5x8wjny8nbffrjmld01pzhkhfqn4vph"))))
@@ -877,10 +871,7 @@ (define-public qtsensors
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0qccpgbhyg9k4x5nni7xm0pyvaqia3zrcd42cn7ksf5h21lwmkxw"))))
@@ -910,10 +901,7 @@ (define-public qtmultimedia
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1sczzcvk3c5gczz53yvp8ma6gp8aixk5pcq7wh344c9md3g8xkbs"))
@@ -961,10 +949,7 @@ (define-public qtwayland
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0al3yypy3fin62n8d1859jh0mn0fbpa161l7f37hgd4gf75365nk"))
@@ -1021,10 +1006,7 @@ (define-public qtserialport
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "08ga9a1lwj83872nxablk602z1dq0la6jqsiicvd7m1sfbfpgnd6"))))
@@ -1055,10 +1037,7 @@ (define-public qtserialbus
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "14bahg82jciciqkl74q9hvf3a8kp3pk5v731vp2416k4b8bn4xqb"))))
@@ -1090,10 +1069,7 @@ (define-public qtwebchannel
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0x7q66994pw6cd0f505bmirw1sssqs740zaw8lyqqqr32m2ch7bx"))))
@@ -1114,10 +1090,7 @@ (define-public qtwebglplugin
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "05rl657848fsprsnabdqb5z363c6drjc32k59223vl351f8ihhgb"))))
@@ -1150,10 +1123,7 @@ (define-public qtwebview
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0jzzcm7z5njkddzfhmyjz4dbbzq8h93980cci4479zc4xq9r47y6"))))
@@ -1203,10 +1173,7 @@ (define-public qttools
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1iakl3hlyg51ri1czmis8mmb257b0y1zk2a2knybd3mq69wczc2v"))))
@@ -1231,10 +1198,7 @@ (define-public qtscript
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1zlvg3hc6h70d789g3kv6dxbwswzkskkm00bdgl01grwrdy4izg9"))
@@ -1255,10 +1219,7 @@ (define-public qtquickcontrols
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0qa4dlhn3iv9yvaic8hw86v6h8rn9sgq8xjfdaym04pfshfyypfm"))))
@@ -1279,10 +1240,7 @@ (define-public qtquickcontrols2
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0q0mk2mjlf9ll0gdrdzxy8096s6g9draaqiwrlvdpa7lv14x7xzs"))))
@@ -1304,10 +1262,7 @@ (define-public qtgraphicaleffects
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "03xmwhapv0b2qj661iaqqrvhxc7qiid0acrp6rj85824ha2pyyj8"))))
@@ -1331,10 +1286,7 @@ (define-public qtgamepad
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "00wd3h465waxdghg2vdhs5pkj0xikwjn88l12477dksm8zdslzgp"))))
@@ -1361,10 +1313,7 @@ (define-public qtscxml
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "141pfschv6zmcvvn3pi7f5vb4nf96zpngy80f9bly1sn58syl303"))
@@ -1392,10 +1341,7 @@ (define-public qtpurchasing
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0lg8x7g7dkf95xwxq8b4yw4ypdz68igkscya96xwbklg3q08gc39"))))
@@ -1412,10 +1358,7 @@ (define-public qtcharts
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1drvm15i6n10b6a1acgarig120ppvqh3r6fqqdn8i3blx81m5cmd"))))
@@ -1439,10 +1382,7 @@ (define-public qtdatavis3d
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "080fkpxg70m3c697wfnkjhca58b7r1xsqd559jzb21985pdh6g3j"))))
@@ -1466,10 +1406,7 @@ (define-public qtnetworkauth
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "0pi6p7bq54kzij2p69cgib7n55k69jsq0yqq09yli645s4ym202g"))))
@@ -1495,10 +1432,7 @@ (define-public qtremoteobjects
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1mhlws5w0igf5hw0l90p6dz6k7w16dqfbnk2li0zxdmayk2039m6"))))
@@ -1532,10 +1466,7 @@ (define-public qtspeech
     (version "5.14.2")
     (source (origin
              (method url-fetch)
-             (uri (string-append "https://download.qt.io/official_releases/qt/"
-                                 (version-major+minor version) "/" version
-                                 "/submodules/" name "-everywhere-src-"
-                                 version ".tar.xz"))
+             (uri (qt5-urls name version))
              (sha256
               (base32
                "1nn6kspbp8hfkz1jhzc1qx1m9z7r1bgkdqgi9n4vl1q25yk8x7jy"))))
@@ -1597,10 +1528,7 @@ (define-public qtwebengine
     (source
      (origin
        (method url-fetch)
-       (uri (string-append "https://download.qt.io/official_releases/qt/"
-                           (version-major+minor version) "/" version
-                           "/submodules/" name "-everywhere-src-"
-                           version ".tar.xz"))
+       (uri (qt5-urls name version))
        (sha256
         (base32
          "0iy9lsl6zxlkca6x2p1506hbj3wmhnaipg23z027wfccbnkxcsg1"))