diff --git a/latest.Dockerfile b/latest.Dockerfile
index 2c777f3cae63acb1e48aa9886f65be7b8b1fd840..899cf1cad4e97dd8f3312286ec65d6e7255b3575 100644
--- a/latest.Dockerfile
+++ b/latest.Dockerfile
@@ -33,6 +33,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify "ghc-$GHC_VERSION-src.tar.xz.sig" "ghc-$GHC_VERSION-src.tar.xz" \
   && tar -xJf "ghc-$GHC_VERSION-src.tar.xz" \
diff --git a/prior/8.10.1.Dockerfile b/prior/8.10.1.Dockerfile
index 1ab4dc7eefa5c816e37f64f3a0cccd23263b6a54..bcbd91c3487a4e7d0504b149d07305760b716c53 100644
--- a/prior/8.10.1.Dockerfile
+++ b/prior/8.10.1.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/8.10.4.Dockerfile b/prior/8.10.4.Dockerfile
index 40b74a348061c87990ed977bb62df4d640e7b638..98a3029c2a4b90eaed2573cc9754d5ba8ce37351 100644
--- a/prior/8.10.4.Dockerfile
+++ b/prior/8.10.4.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/8.10.5.Dockerfile b/prior/8.10.5.Dockerfile
index 4fee5179409ef586817d277429cd72d312362b87..4f04d811d0727eb422a8bc6244eadccf28f2ad10 100644
--- a/prior/8.10.5.Dockerfile
+++ b/prior/8.10.5.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/8.10.6.Dockerfile b/prior/8.10.6.Dockerfile
index 7bc719259ec1dcfc50e40a16b21a8cc810a083b4..d43182d0643e24877c230e38a60566a41287d57a 100644
--- a/prior/8.10.6.Dockerfile
+++ b/prior/8.10.6.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/8.10.7.Dockerfile b/prior/8.10.7.Dockerfile
index 38dcc9717ea3a9e54cec103fc7d05e7898f7def0..50680c40e188cb05fcf76a36b8e0bc96e1cfa670 100644
--- a/prior/8.10.7.Dockerfile
+++ b/prior/8.10.7.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/8.8.4.Dockerfile b/prior/8.8.4.Dockerfile
index e5ff6122d727cab9e563f5fbb506139d6a96789f..6ac95449773928e98889241cce3b8e7cb628536d 100644
--- a/prior/8.8.4.Dockerfile
+++ b/prior/8.8.4.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.0.1.Dockerfile b/prior/9.0.1.Dockerfile
index d841b558c210f1a7d09f27356cba91d39a00aa94..03bad97beef746f6058a8abd12940b6739953d99 100644
--- a/prior/9.0.1.Dockerfile
+++ b/prior/9.0.1.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.0.2.Dockerfile b/prior/9.0.2.Dockerfile
index 4741225c44734219c6493ae0ed7bdd1a6f5cf8c4..2910f83c270a6aab8fc69b1c134c8e2da0ee4a08 100644
--- a/prior/9.0.2.Dockerfile
+++ b/prior/9.0.2.Dockerfile
@@ -28,6 +28,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.1.Dockerfile b/prior/9.2.1.Dockerfile
index b20536c0bb6b62f3888cb0c3a3d706c1446def81..30ba4cac05a89af5c44ae6e809bfc12e8eddb663 100644
--- a/prior/9.2.1.Dockerfile
+++ b/prior/9.2.1.Dockerfile
@@ -31,6 +31,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.2.Dockerfile b/prior/9.2.2.Dockerfile
index 9a1ee58a50eb7003364a6b2d874c04edc6f4418d..dd84fa68e7b73941dcaaa8a328a4fd53bef975e5 100644
--- a/prior/9.2.2.Dockerfile
+++ b/prior/9.2.2.Dockerfile
@@ -29,6 +29,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.3.Dockerfile b/prior/9.2.3.Dockerfile
index 8c38434c657f850104fed6e199cc53665a9598af..11899a06633fa7202359999e81b30bec46902d6c 100644
--- a/prior/9.2.3.Dockerfile
+++ b/prior/9.2.3.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.4.Dockerfile b/prior/9.2.4.Dockerfile
index 216d7a5ca4934dc9b00c2a13ee7b3dbf992f191e..5550645efc27ab2c86fd18a7ff39fd96f3c1fa62 100644
--- a/prior/9.2.4.Dockerfile
+++ b/prior/9.2.4.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.5.Dockerfile b/prior/9.2.5.Dockerfile
index c64c2ccb902e3b1e55ed8336b2fb970443ceedaf..69a1bcae7edb5ed86f50761f3cc7917624e97f83 100644
--- a/prior/9.2.5.Dockerfile
+++ b/prior/9.2.5.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.6.Dockerfile b/prior/9.2.6.Dockerfile
index 30c939dcd0f87c67c3e297ffb8c1a60ff491dc1c..8147719bed4b3be692fe3527aa2c311504ced15d 100644
--- a/prior/9.2.6.Dockerfile
+++ b/prior/9.2.6.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.7.Dockerfile b/prior/9.2.7.Dockerfile
index 19e5d8016d60d7b8ee3ddc95e9a2546f2247306b..81ba50bddb69bc0b0897affaec2da52ef4b583b3 100644
--- a/prior/9.2.7.Dockerfile
+++ b/prior/9.2.7.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.2.8.Dockerfile b/prior/9.2.8.Dockerfile
index 970333b989588e0dc50eca3ad84f1f956c6ead5f..5a138426f582f763423b0153b185c4f65ea15b43 100644
--- a/prior/9.2.8.Dockerfile
+++ b/prior/9.2.8.Dockerfile
@@ -33,6 +33,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify "ghc-$GHC_VERSION-src.tar.xz.sig" "ghc-$GHC_VERSION-src.tar.xz" \
   && tar -xJf "ghc-$GHC_VERSION-src.tar.xz" \
diff --git a/prior/9.4.1.Dockerfile b/prior/9.4.1.Dockerfile
index 23369c0cb68418bb6083ca46dbea40b55227674c..e4ba413c9d982d2d2600562dab9a3ba26fdabcff 100644
--- a/prior/9.4.1.Dockerfile
+++ b/prior/9.4.1.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.4.2.Dockerfile b/prior/9.4.2.Dockerfile
index bd063a3e58c02d7433439eb8dca5b01f66d0cee5..9316e386ce0a6a36e3564e3243d6d6975269bbec 100644
--- a/prior/9.4.2.Dockerfile
+++ b/prior/9.4.2.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.4.3.Dockerfile b/prior/9.4.3.Dockerfile
index bcddb22742963b591ba2285a63a3cecfd5e30cc2..ae190df3d4f9464a1eb7d62c25df78f8b8722338 100644
--- a/prior/9.4.3.Dockerfile
+++ b/prior/9.4.3.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.4.4.Dockerfile b/prior/9.4.4.Dockerfile
index 680e20a0d86ecd6a4994e05d931964fc9a6ff90d..09ad71ac4833ea0401b3f7eb3f713fc399ac5a86 100644
--- a/prior/9.4.4.Dockerfile
+++ b/prior/9.4.4.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.4.5.Dockerfile b/prior/9.4.5.Dockerfile
index e28c76bea1e5667e4955e019c4bce79e9e193e5c..629f4b9ba62f211719e6c9f696a5d78e01d83290 100644
--- a/prior/9.4.5.Dockerfile
+++ b/prior/9.4.5.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/$GHC_VERSION/ghc-$GHC_VERSION-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify ghc-$GHC_VERSION-src.tar.xz.sig ghc-$GHC_VERSION-src.tar.xz \
   && tar xf ghc-$GHC_VERSION-src.tar.xz \
diff --git a/prior/9.4.6.Dockerfile b/prior/9.4.6.Dockerfile
index c51fb2c7fb52c3dc5472e2c90acd90347098e14f..d3f767f80b3d569ee82bf83fdf86558a0db13bb7 100644
--- a/prior/9.4.6.Dockerfile
+++ b/prior/9.4.6.Dockerfile
@@ -33,6 +33,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify "ghc-$GHC_VERSION-src.tar.xz.sig" "ghc-$GHC_VERSION-src.tar.xz" \
   && tar -xJf "ghc-$GHC_VERSION-src.tar.xz" \
diff --git a/prior/9.4.7.Dockerfile b/prior/9.4.7.Dockerfile
index 6c211df62d5cca39b33d33ac2dbc8d1e9b3dd770..8462a46eb14e26b9233d6315f3c2c473b885e8af 100644
--- a/prior/9.4.7.Dockerfile
+++ b/prior/9.4.7.Dockerfile
@@ -33,6 +33,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys 88B57FCF7DB53B4DB3BFA4B1588764FBE22D19C4 \
   && gpg --verify "ghc-$GHC_VERSION-src.tar.xz.sig" "ghc-$GHC_VERSION-src.tar.xz" \
   && tar -xJf "ghc-$GHC_VERSION-src.tar.xz" \
diff --git a/prior/9.6.1.Dockerfile b/prior/9.6.1.Dockerfile
index d2ded6afeb6c85a5fbb0079e090ece9741e371c4..40c45b45c06022fac7af3de580c09899bac1e9e3 100644
--- a/prior/9.6.1.Dockerfile
+++ b/prior/9.6.1.Dockerfile
@@ -32,6 +32,8 @@ RUN cd /tmp \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz \
   && curl -sSLO https://downloads.haskell.org/~ghc/"$GHC_VERSION"/ghc-"$GHC_VERSION"-src.tar.xz.sig \
   && gpg --keyserver hkps://keyserver.ubuntu.com:443 \
+    --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD || \
+    gpg --keyserver hkp://keyserver.ubuntu.com:80 \
     --receive-keys FFEB7CE81E16A36B3E2DED6F2DE04D4E97DB64AD \
   && gpg --verify "ghc-$GHC_VERSION-src.tar.xz.sig" "ghc-$GHC_VERSION-src.tar.xz" \
   && tar -xJf "ghc-$GHC_VERSION-src.tar.xz" \